Biology

Etymology

The word biology is derived from the Greek noun bios, meaning 'life' (from the Proto-Indo-European root *gwei-, to live), and the suffix -logia, meaning 'study of'.^[5][6] The Latin form of the term appeared in 1736 when Carl Linnaeus used biologi in his work Bibliotheca botanica.^[6][7][8] The compound term appeared in 1766 in the title of Volume 3 of Michael Christoph Hanow's Philosophiae naturalis sive physicae dogmaticae: Geologia, biologia, phytologia generalis et dendrologia.^[8] The German form Biologie was used in 1771 in a translation of Linnaeus's work, and in 1797 Theodor Georg August Roose used it in the preface of Grundzuege der Lehre von der Lebenskraft.^[6][7][8]

The term biology in its modern sense was introduced independently by several authors around the turn of the nineteenth century: by Thomas Beddoes in 1799, by Karl Friedrich Burdach in 1800 in a more restricted anthropological context, and broadly in 1802 by Gottfried Reinhold Treviranus in Biologie oder Philosophie der lebenden Natur and Jean-Baptiste Lamarck in Hydrogeologie.^{[6][7][8][9][10][11][12][13][14][15]} Treviranus defined the objects of biological research as the different forms and manifestations of life, the conditions and laws under which these phenomena occur, and the causes that bring them about, designating this inquiry as biology or the doctrine of life.^[16][17]

History

Although modern biology emerged as a unified field in the nineteenth century, natural inquiry into living organisms extends back to antiquity. The earliest roots of scientific and medical knowledge trace to ancient Egypt and Mesopotamia between approximately 3000 and 1200 BCE.^{[18][19][20][21]} These traditions shaped ancient Greek natural philosophy.^[22][23][24] Early Greek thinkers, such as Alcmaeon around 500 BCE, conducted animal dissections and described sensory organs.^[25] Hippocrates (c. 460 to 370 BCE) established formal medical practice and sought natural rather than divine explanations for bodily ailments.^{[25][26][27][28]} Aristotle (384 to 322 BCE) contributed extensively to the investigation of biological causation and the diversity of life in works such as History of Animals, examining over 500 animal species and classifying them into groups with blood and without blood.^{[25][28][29][30][31]} His successor at the Lyceum, Theophrastus, wrote foundational series on botany that remained influential into the Middle Ages.^{[26][27][30][32][33]}

Scholars of the medieval Islamic world expanded biological and medical knowledge. Al-Jahiz (781 to 869) authored writings on zoology and discussed environmental influences on animals.^{[33][34][35][36][37]} Al-Dinawari (828 to 896) wrote detailed botanical works, and Rhazes (865 to 925) compiled treatises on anatomy and physiology.^{[33][34][35][37][38][39][40][41]} Islamic scholars synthesized Greek philosophical traditions while developing empirical observations and clinical medicine, with natural history largely adhering to Aristotelian concepts of the hierarchy of life.^[33][34]

Biological observation accelerated in the seventeenth century with the development of the microscope. Robert Hooke described microscopic chambers in cork tissue in 1665 and introduced the word cell.^[42][43] Anton van Leeuwenhoek improved lenses, enabling the discovery of spermatozoa, bacteria, infusoria, and the broad diversity of microscopic life.^[23][44] Jan Swammerdam pursued investigations that opened modern interest in entomology and developed early techniques for microscopic dissection and histological staining.^[23][44]

Natural history during the eighteenth century focused on cataloging and organizing biological diversity. Carl Linnaeus published a systematic taxonomy of the natural world in 1735 and introduced binomial nomenclature for all cataloged species in the 1750s.^[45][46][47] Georges-Louis Leclerc, Comte de Buffon, challenged rigid categorizations, regarding living forms as malleable and raising the possibility of common descent.^[46][48] Although Buffon opposed evolutionary transformation, his writings exerted a strong influence on later evolutionary theorists.^[46][48][49]

Cellular concepts advanced rapidly in the early nineteenth century. In 1838 and 1839, Matthias Jakob Schleiden and Theodor Schwann promoted two principles: that the cell is the basic structural and functional unit of organisms, and that individual cells possess the properties of life.^[50][51][52] Schleiden and Schwann initially resisted the concept that all cells originate from previous cells, retaining a belief in spontaneous generation.^[50][51][53] Robert Remak and Rudolf Virchow later substantiated the principle that all cells arise from the division of pre-existing cells, consolidating the three tenets of cell theory by the 1860s.^{[42][50][51][54][55]}

Evolutionary thought took coherent form in the work of Jean-Baptiste Lamarck, who presented an early theory of transmutational evolution based on environmental pressures and the inheritance of acquired traits.^{[56][57][58][59][60]} In 1859, Charles Darwin published On the Origin of Species, having written his initial sketch in 1842.^[61] Darwin synthesized the biogeography of Alexander von Humboldt, the uniformitarian geology of Charles Lyell, and the population principles of Thomas Malthus with extensive morphological and field observations to establish evolution by natural selection.^[62][63] Alfred Russel Wallace independently arrived at the same conclusions based on similar reasoning and empirical evidence.^[63][64]

Gregor Mendel outlined the basic laws of inheritance through plant hybridization experiments published in 1865.^[65][66] The significance of his findings went unrecognized until their rediscovery in the early twentieth century, which allowed the modern evolutionary synthesis to unite Darwinian natural selection with Mendelian genetics and population genetics.^[67][68] Experiments by Alfred Hershey and Martha Chase in 1952 confirmed DNA as the hereditary material of chromosomes.^[69][70][71] James Watson and Francis Crick described the double-helical structure of DNA in 1953, utilizing X-ray diffraction work by Rosalind Franklin and Maurice Wilkins.^[69][72] The genetic code was subsequently deciphered by Har Gobind Khorana, Robert W. Holley, and Marshall Warren Nirenberg.^[69][73] In 1990, the Human Genome Project was launched to sequence the complete human genome, reaching essential completion in 2003.^[69][74]

Chemical Basis of Life

All living organisms are composed of chemical elements.^[2][75][76] Four elements: oxygen, carbon, hydrogen, and nitrogen, make up approximately 96% of the mass of all organisms, while calcium, phosphorus, sulfur, sodium, chlorine, and magnesium constitute the remainder.^[2][75][76] These elements combine into essential compounds such as water, which is fundamental to biological function.^[2][75] Biochemistry studies the chemical reactions and processes within and relating to living systems, while molecular biology examines biological activities at the level of biomolecules, their synthesis, modifications, and mutual interactions.^[2]

Water

Life originated in Earth's early oceans, which formed around 3.8 billion years ago, and water remains the most abundant molecule in every organism.^[77][78] Water is an effective solvent capable of dissolving polar and charged solutes, such as sodium and chloride ions, into aqueous solutions where chemical reactions can proceed.^[77][78] The water molecule (H2O) has a bent structure produced by polar covalent bonds between two hydrogen atoms and one oxygen atom.^[77][78] Oxygen carries a slight negative charge while the hydrogens carry slight positive charges, enabling water molecules to attract one another via hydrogen bonds.^[77][78]

Hydrogen bonding gives water cohesive properties, generating surface tension through attractive forces at the liquid surface.^[77][78] Water is also adhesive, sticking to other polar or charged surfaces.^[77][78] Water is denser as a liquid than as solid ice, allowing ice to float on bodies of water and insulate underlying aquatic environments from freezing air temperatures.^[77][78] Water exhibits a high specific heat capacity compared to solvents such as ethanol, requiring substantial energy input to break hydrogen bonds during phase transitions into vapor.^[77][78] Water molecules constantly dissociate into hydrogen and hydroxyl ions before recombining, with pure water maintaining an equal balance between the two ions to yield a neutral pH.^[77][78]

Organic Compounds

Organic compounds are molecules containing carbon bonded to other elements, particularly hydrogen.^[77][78] Excluding water, almost all molecules composing organisms are carbon-based.^{[2][77][78][79]} Carbon possesses four valence electrons, allowing it to form up to four covalent bonds in diverse geometries, including single bonds (as in methane), double bonds (as in carbon dioxide), triple bonds (as in carbon monoxide), extended chains (as in octane), or ring systems (as in glucose).^{[2][77][78][79][80]}

The simplest organic molecules are hydrocarbons, which consist solely of carbon and hydrogen chains. Other elements, including oxygen, nitrogen, phosphorus, and sulfur, can substitute along the carbon backbone, forming functional groups that alter chemical behavior.^[77][78] Six prominent functional groups in living organisms are the amino, carboxyl, carbonyl, hydroxyl, phosphate, and sulfhydryl groups.^[77][78] In 1953, the Miller-Urey experiment demonstrated that organic compounds, including amino acids, could be synthesized abiotically inside a closed system simulating the prebiotic conditions of early Earth.^{[77][78][81][82][83][84][85]}

Macromolecules

Macromolecules are large molecules composed of smaller subunits or monomers, including sugars, amino acids, and nucleotides.^{[2][77][86][87]} Carbohydrates encompass monomeric sugars and their polymers, serving energetic and structural functions.^[77][88] Lipids represent the only major class of macromolecules not formed by polymers; they consist of largely non-polar and hydrophobic compounds, including steroids, phospholipids, and fats.^{[2][77][87][89]} Proteins display extensive functional diversity, serving as enzymes, transport channels, signaling messengers, antibodies, and structural supports, and are constructed from combinations of twenty standard amino acids.^[77][86] Nucleic acids are polymers of nucleotides whose primary biological role is to store, transmit, and express hereditary information.^{[2][77][87][90]}

Cells

Cell theory establishes that cells are the basic units of life, that all living things consist of one or more cells, and that all cells arise from pre-existing cells through cell division.^[91][92][93] Most cells range between 1 and 100 micrometers in diameter, requiring light or electron microscopy for visualization.^[94] Cells are divided into two fundamental groups: prokaryotic cells, which lack a membrane-bound nucleus, and eukaryotic cells, which possess a membrane-enclosed nucleus. Prokaryotes (bacteria and archaea) are single-celled organisms, whereas eukaryotes include unicellular protists as well as multicellular fungi, plants, and animals. In multicellular organisms, every specialized cell traces its lineage back to a single fertilized egg cell.^[91]

Cell Structure

Every cell is enclosed by a cell membrane that separates its cytoplasm from the extracellular space.^[2][76][95] The cell membrane consists of a lipid bilayer interspersed with cholesterol molecules that regulate fluidity across variable temperatures.^[2][95] Biological membranes are semipermeable, permitting passive diffusion of small molecules such as oxygen, carbon dioxide, and water while restricting large or charged particles such as ions.^[96] Cell membranes contain integral proteins that span the bilayer to act as transport channels or receptors, and peripheral proteins that associate loosely with membrane surfaces to assist in enzymatic reactions and cytoskeletal anchorage.^[97]

Eukaryotic cytoplasm houses numerous specialized organelles surrounded by lipid membranes.^[83][98] The nucleus houses the majority of genomic DNA, while mitochondria produce adenosine triphosphate (ATP) via cellular respiration.^[83][98] The endoplasmic reticulum and Golgi apparatus participate in the synthesis and packaging of proteins and lipids, and lysosomes degrade macromolecules and cellular debris.^[83][98] Plant cells possess specialized structures absent in animal cells: a rigid cellulose cell wall, photosynthetic chloroplasts that convert solar energy into chemical sugars, and a large central vacuole that provides turgor pressure, storage, and seed degradation support.^[83][98] The eukaryotic cytoskeleton provides structural shape and facilitates cellular motility through three protein components: microtubules composed of alpha and beta tubulin, intermediate filaments composed of fibrous proteins, and microfilaments composed of actin.^[83][98]

Metabolism and Energy Processing

Metabolism constitutes the complete set of chemical reactions occurring within an organism to maintain life.^[99] Its primary purposes are the conversion of food into energy for cellular processes, the conversion of fuel into monomer building blocks, and the elimination of metabolic waste products.^[99] Metabolic pathways are divided into catabolic reactions, which degrade larger compounds to release energy (such as the breakdown of glucose into pyruvate), and anabolic reactions, which consume energy to synthesize complex molecules such as proteins, lipids, and nucleic acids.^[99] Enzymes function as biological catalysts, accelerating reaction rates without being consumed by lowering the activation energy required to convert reactants into products.^[99] Enzymes also enable cellular regulation in response to changing internal conditions and extracellular signals.^[99]

Cellular Respiration and Fermentation

Cellular respiration is a series of catabolic metabolic reactions that transform chemical energy from nutrients into ATP and release waste products.^[100][101] Aerobic respiration occurs in the presence of oxygen across four stages: glycolysis, pyruvate oxidation, the citric acid (Krebs) cycle, and oxidative phosphorylation.^[101][102] Glycolysis takes place in the cytoplasm, breaking down one molecule of glucose into two molecules of pyruvate while yielding a net production of two ATP and two NADH.^[101][102] Pyruvate is transported into the mitochondria and converted to acetyl-CoA by the pyruvate dehydrogenase complex, releasing carbon dioxide and generating NADH.^[101][102] Acetyl-CoA enters the citric acid cycle within the mitochondrial matrix, producing six NADH, two FADH2, and two ATP per initial glucose molecule.^[101][102]

Oxidative phosphorylation occurs on the mitochondrial cristae.^[101][102] Four protein complexes comprising the electron transport chain transfer electrons from NADH and FADH2 to molecular oxygen, the final electron acceptor.^[101][102] This electron transfer drives the pumping of protons across the inner mitochondrial membrane, generating an electrochemical proton motive force by chemiosmosis.^[101][102] As protons flow back through ATP synthase, ADP is phosphorylated into ATP.^[101][102]

Photosynthesis

Photosynthesis is the process by which photosynthetic autotrophs, including plants, algae, and cyanobacteria, convert light energy into chemical energy stored in carbohydrates synthesized from carbon dioxide and water.^{[103][104][105][106][107]} Photosynthesis is responsible for producing and sustaining the oxygen content of Earth's atmosphere and supplies organic energy to terrestrial and aquatic food webs.^[108][109] The process proceeds through four distinct stages: light absorption, electron transport, ATP synthesis, and carbon fixation.^[101][102]

During the initial light-dependent reactions, chlorophyll pigments in thylakoid membranes absorb photons, exciting electrons that are transferred from a water donor to a primary quinone acceptor (Q), releasing molecular oxygen as a byproduct.^[101][102] Electrons travel through carrier complexes to photosystem I, reducing NADP+ to NADPH while pumping protons into the thylakoid lumen to establish a pH gradient analogous to the proton motive force of mitochondria.^[101][102] Protons passing through ATP synthase drive ATP production.^[101][102] In the subsequent light-independent reactions of the Calvin cycle, the ATP and NADPH are consumed to fix atmospheric carbon dioxide into ribulose-1,5-bisphosphate (RuBP), yielding three-carbon sugars that are converted into glucose and other carbohydrates.^{[101][102][110]}

Cell Signaling

Cell signaling is the process by which cells receive, process, and transmit environmental and intercellular cues.^[111][112] Signals may be non-chemical (such as light, mechanical pressure, or temperature) or chemical ligands that interact with membrane-embedded or intracellular receptors.^{[83][112][113]} Chemical signaling is categorized into four mechanisms: autocrine signaling (affecting the releasing cell itself), paracrine signaling (diffusing locally to adjacent cells, such as neurotransmitters across a synaptic cleft), juxtacrine signaling (requiring direct physical contact between adjacent cell surfaces), and endocrine signaling (involving hormones that circulate over long distances through vascular or circulatory systems).^[83][113]

Ligand binding induces conformational changes in receptor proteins, altering cellular behavior through signal transduction cascades.^[83] Primary receptor types include ligand-gated ion channels, receptor protein-tyrosine kinases (such as the insulin receptor), and G protein-coupled receptors.^[83] Activation of G protein-coupled receptors typically triggers second-messenger cascades (such as cyclic AMP or calcium release), amplifying initial extracellular signals into broad downstream changes in metabolic activity or gene expression.^[83]

Cell Cycle and Division

The eukaryotic cell cycle encompasses the series of regulated events leading to cell growth, chromosome duplication, and cell division.^[114][115] Eukaryotic cells divide through mitosis or meiosis.^[116][117] Mitosis is part of the mitotic phase in which replicated nuclear chromosomes are segregated into two genetically identical daughter nuclei, maintaining the somatic chromosome count.^[118] Mitosis follows the DNA replication of the interphase S phase and is concluded by cytokinesis, which divides the cytoplasm, organelles, and cell membrane into two daughter cells.^[118] In contrast, meiosis consists of one round of DNA replication followed by two nuclear divisions (meiosis I and meiosis II), generating four haploid gametes containing half the chromosome complement of the parent cell.^[77][119]

Prokaryotic cells (bacteria and archaea) divide by binary fission without an assembly of a eukaryotic mitotic spindle.^[120][121] Prior to binary fission, the single circular bacterial chromosome uncoils and replicates, and the two copies migrate to opposite poles as the cell elongates.^[120][121] Cell division is initiated by the polymerization of the FtsZ protein into a contracting Z-ring at the division plane, driving the inward synthesis of a peptidoglycan septum that cleaves the cell into two independent daughters containing plasmids, ribosomes, and genomic DNA.^[120][121]

Sexual Reproduction and Heterosis

Meiosis is a central feature of eukaryotic sexual reproduction whose primary function appears to be the preservation of genomic integrity transmitted to offspring.^[122][123] Two main aspects of sexual reproduction, meiotic recombination and outcrossing, are probably maintained respectively by the adaptive advantages of recombinational repair of genomic DNA damage and genetic complementation that masks deleterious recessive mutations.^[124] The masking effect of genetic complementation derived from cross-fertilization is termed hybrid vigor or heterosis.^[124][125] Charles Darwin observed in his 1878 treatise on cross- and self-fertilization in plants that cross-fertilization is generally beneficial while self-fertilization is frequently harmful. Genetic variation, often produced as a byproduct of sexual reproduction, can provide long-term advantages to sexual lineages that practice outcrossing.^[124][125]

Genetics and Molecular Biology

Genetics is the scientific study of heredity, genes, and biological variation.^{[126][127][128][129][130]} Classical Mendelian genetics demonstrates that inherited traits are determined by discrete factors, called alleles, that exist in alternative forms and are inherited from each parent.^[66] Gregor Mendel's principles include the law of dominance and uniformity (dominant alleles mask the phenotype of recessive alleles), the law of segregation (alleles separate during gamete formation so each gamete carries one allele per gene), and the law of independent assortment (unlinked genes for different traits sort independently).^[66][131] Test crosses and Punnett squares allow prediction of phenotypic and genotypic outcomes.^[66][131] Thomas Hunt Morgan's experiments with Drosophila melanogaster established the chromosome theory of inheritance by demonstrating sex linkage between eye color and sex chromosomes.^[132]

Genes, DNA, and Mutations

A gene is a discrete unit of heredity corresponding to a region of deoxyribonucleic acid (DNA) that carries information regulating organismal form or function.^[83][133] DNA consists of two complementary polynucleotide chains twisted into a right-handed double helix held together by hydrogen bonds between nitrogenous bases.^[83][133] In eukaryotes, genomic DNA is packaged with histone proteins into linear chromosomes located inside the nucleus, with small portions residing in mitochondria and chloroplasts; in prokaryotes, DNA is arranged as circular chromosomes inside a cytoplasmic nucleoid.^{[134][135][136][137][138]} The complete assemblage of genetic information in an organism constitutes its genotype.^[139][140]

DNA replication is semiconservative, with each parental strand serving as a template for synthesizing a new complementary strand.^[83][133] Mutations are heritable alterations in nucleotide sequences.^[83][133] They arise spontaneously through proofreading and replication errors or are induced by environmental mutagens, such as chemical agents (nitrous acid, benzopyrene) or ionizing and non-ionizing radiation (X-rays, gamma rays, ultraviolet radiation).^[83][133] Mutations can lead to phenotypic effects such as loss of function, gain of function, and conditional mutations; some mutations are beneficial as a source of genetic variation for evolution, while others are harmful if they cause the loss of function of genes needed for survival.^[83][133]

Gene Expression and Regulation

Gene expression is the molecular process by which DNA-encoded genotypes give rise to observable phenotypes through the synthesis of proteins.^[141] The central dogma of molecular biology, formulated by Francis Crick in 1958, describes the directional flow of genetic information: DNA is transcribed into messenger RNA (mRNA), and mRNA is translated by ribosomes into polypeptide amino acid chains.^{[141][142][143][144][145][146][147]} The genetic code operates through triplet codons, using standard rules of translation that are nearly universal across bacteria, archaea, and eukaryotes.^{[69][148][149]}

Gene regulation occurs at multiple steps, including transcription initiation, RNA splicing, translation, post-translational protein modification, and chromatin remodeling.^[83][150] Positive and negative regulation are mediated by transcription factors binding to specific DNA sequences near promoters.^[83][150] In prokaryotes and some lower eukaryotes such as Caenorhabditis elegans, functionally related genes are organized into operons sharing a single promoter.^{[83][150][151][152]} Repressor proteins bind to operators to block transcription until inactivated by inducer compounds (such as allolactose), distinguishing inducible genes from constitutive genes that remain constantly active.^[83][150] Epigenetic modifications, such as DNA methylation and histone acetylation, alter chromatin packing and control transcriptional accessibility without changing the underlying nucleotide sequence.^{[83][150][153]}

Genes, Development, and Evolution

Development is the progressive process through which a multicellular organism develops from a single cell into adult form through four underlying mechanisms: determination, differentiation, morphogenesis, and growth.^[83][154] Determination fixes the developmental fate of a cell, while differentiation transforms unspecialized stem cells into specialized cell types through controlled patterns of gene expression without altering genomic sequence.^{[155][156][157][158][159][160]} Morphogenesis regulates the spatial patterning of tissues and anatomical body plans.^[83][154]

Evolutionary developmental biology (evo-devo) investigates how developmental processes evolve by comparing developmental pathways across diverse organisms.^{[161][162][163]} Development is controlled by a conserved developmental-genetic toolkit shared across animal phyla.^[163] A central finding of evo-devo is deep homology: dissimilar structures such as the camera eyes of vertebrates and cephalopods and the compound eyes of insects are regulated by homologous toolkit genes.^[163] Hox genes represent key toolkit components, encoding transcription factors that specify positional identity along the anteroposterior body axis, dictating the development of repeating anatomical segments such as snake vertebrae or insect appendages.^{[163][164][165]}

Evolution and the History of Life

Evolution is the foundational organizing principle of biology, defined as heritable changes in populations across successive generations.^[166][167] Charles Darwin proposed that natural processes act analogously to artificial selection: organisms possessing heritable traits better suited to local environments enjoy higher survival and reproductive success, leading to adaptation over evolutionary time.^{[2][67][68][83][168][169][170][171]} The modern evolutionary synthesis integrated natural selection with Mendelian genetics, recognizing genetic drift, gene flow, and mutation as additional evolutionary mechanisms.^{[67][172][173][174]}

Speciation and Phylogeny

A species is traditionally defined as a group of interbreeding natural populations that are reproductively isolated from other groups.^{[83][175][176]} Speciation occurs when an ancestral lineage splits into two or more distinct lineages that evolve independently.^[83][175] Speciation requires reproductive isolation, which can result from genetic incompatibilities as described by the Bateson-Dobzhansky-Muller model.^[83][175] Allopatric speciation arises when physical geographic barriers fragment an ancestral population, preventing gene flow and allowing evolutionary divergence.^{[83][175][177]} Sympatric speciation can occur without geographic isolation through mechanisms such as polyploidy or behavioral divergence.^[178]

Phylogeny represents the evolutionary history and genealogical descent of organismal lineages.^[83][179] Relationships are depicted using phylogenetic trees, where branching nodes indicate common ancestors and terminal branches represent descendant taxa.^[83][179] Shared derived traits inherited from a common ancestor are termed homologous features or synapomorphies.^{[68][83][179][180][181]} Biological classification systems are ranked hierarchically into domain, kingdom, phylum, class, order, family, genus, and species.^[83][179] Modern systematic taxonomy classifies all cellular life into three domains: Archaea, Bacteria, and Eukaryota.^{[182][183][184]}

Biological nomenclature is governed by international regulatory codes: the International Code of Nomenclature for algae, fungi, and plants (ICN), the International Code of Zoological Nomenclature (ICZN), the International Code of Nomenclature of Prokaryotes (ICNP), and the International Committee on Taxonomy of Viruses (ICTV) under the International Code of Virus Classification and Nomenclature (ICVCN).^{[185][186][187][188][189][190][191][192]} Efforts to establish a unified BioCode were drafted in 1997 and revised in 2011 to harmonize naming standards across biological domains, though existing separate codes remain authoritative.^{[193][194][195][196][197][198][199][200][201]}

Geological History of Life

Earth formed approximately 4.5 billion years ago, and all extant and extinct organisms descend from a last universal common ancestor (LUCA) that lived roughly 3.5 billion years ago.^{[202][203][204]} The universality of the genetic code across all three domains provides primary evidence for common ancestry.^{[205][206][207][208][209][210][211]} Earth's geological timescale spans four eons: Hadean, Archean, Proterozoic, and Phanerozoic, with the first three collectively known as the Precambrian, lasting approximately 4 billion years.^[83][212] The Phanerozoic eon began 539 million years ago and is divided into the Paleozoic, Mesozoic, and Cenozoic eras, comprising eleven periods: Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian, Triassic, Jurassic, Cretaceous, Tertiary, and Quaternary.^{[83][212][213]}

Microbial mats composed of coexisting bacteria and archaea were the dominant life form during the early Archean eon.^[214][215] The earliest fossil evidence of eukaryotic cells dates to 1.85 billion years ago, with eukaryotic diversification accelerating after cells incorporated oxygen into their metabolism.^{[216][217][218][219]} Multicellular organisms with differentiated cells appeared around 1.7 billion years ago.^[220][221] Microorganisms established the earliest terrestrial ecosystems at least 2.7 billion years ago, while multicellular land plants appeared during the Ordovician period; land plants became so successful that they are thought to have contributed to the Late Devonian extinction.^{[222][223][224][225][226][227]}

The Ediacaran biota flourished during the Ediacaran period, followed by the Cambrian explosion approximately 525 million years ago, which produced modern animal phyla and early vertebrates.^{[228][229][230][231]} Terrestrial ecosystems were dominated by synapsids during the Permian period, but the Permian-Triassic extinction event 252 million years ago eliminated most synapsid lineages.^{[232][233][234]} Archosaurs and their dinosaur descendants subsequently dominated the Jurassic and Cretaceous periods.^{[235][236][237][238]} The Cretaceous-Paleogene extinction 66 million years ago eliminated non-avian dinosaurs, opening ecological niches that facilitated a rapid diversification of mammals and birds.^{[238][239][240][241][242][243]}

Biological Diversity

Biological diversity encompasses all forms of life across Earth's ecosystems. Estimates indicate that Earth houses millions of species, ranging from single-celled prokaryotes to complex multicellular plants and animals.^{[205][209][244][245][246]} These organisms participate in specialized food webs and nutrient cycling pathways within their biophysical environments.^[205][209]

Bacteria and Archaea

Bacteria are prokaryotic microorganisms typically several micrometers in length that display varied morphologies, including spheres, rods, and spirals.^{[247][248][249]} Bacteria were among the earliest life forms on Earth and occupy almost every habitat, including soils, aquatic bodies, acidic hot springs, radioactive waste, and deep crustal lithospheres, as well as establishing symbiotic or parasitic relationships with hosts.^{[247][248][249]} Only approximately 27% of bacterial phyla contain species that can be cultured in laboratory settings.^[249]

Archaea constitute the other prokaryotic domain and were historically termed archaebacteria.^[250][251] Although sharing general size and morphological similarities with bacteria, archaea possess unique biochemical features, including cell membranes composed of ether-linked lipids (such as archaeols) and metabolic transcription and translation enzymes more closely related to eukaryotes.^{[14][252][253][254]} Archaea utilize diverse energy sources, ranging from organic sugars to ammonia, metal ions, and hydrogen gas; haloarchaea utilize sunlight via bacteriorhodopsin, and others fix carbon, though no known species does both.^[253] Archaea reproduce asexually by binary fission, fragmentation, or budding, and form no endospores.^[253] Originally recognized as extremophiles inhabiting thermal springs and hypersaline basins, archaea are now known to be ubiquitous across global oceans and plankton, playing important roles in the human gut, mouth, and skin microbiomes, as well as driving global nitrogen and carbon cycles.^{[255][256][257][258]}

Eukaryotes

Eukaryotic cells originated via endosymbiosis (symbiogenesis) between an archaeal host lineage and bacterial endosymbionts, which evolved into mitochondria and chloroplasts.^[83][259] Eukaryotes diversified into eight major clades approximately 1.5 billion years ago: alveolates, excavates, stramenopiles, plants (Plantae), rhizarians, amoebozoans, fungi, and animals (Animalia).^[83][259] Five of these clades consist predominantly of microscopic unicellular eukaryotes termed protists, an informal grouping of convenience rather than a monophyletic clade.^{[83][259][260][261][262][263]}

Plants are multicellular photosynthetic eukaryotes of the kingdom Plantae, deriving their chloroplasts from primary endosymbiosis with a cyanobacterium roughly 1 billion years ago.^[83][264] Basal photosynthetic lineages are aquatic algae, comprising distinct clades: unicellular glaucophytes, multicellular red algae, and green algae (subdivided into chlorophytes, coleochaetophytes, and stoneworts).^[83][264] Fungi are eukaryotic heterotrophs that secrete digestive enzymes to break down food externally before absorbing nutrients through their cell walls, functioning as major ecological decomposers and saprobes.^[83][265] Animals are multicellular heterotrophic eukaryotes that ingest organic matter, breathe oxygen, move, reproduce sexually, and pass through a blastula embryonic stage.^[83][266] Over 1.5 million animal species have been formally described, of which approximately 1 million are insects, with total animal diversity estimated to exceed 7 million species.^[83][266]

Viruses and Sub-Viral Entities

Viruses are submicroscopic infectious agents that replicate exclusively within the living cells of host organisms, infecting animals, plants, bacteria, and archaea.^{[267][268][269][270][271]} More than 6,000 virus species have been documented in detail. Viruses are found in almost every ecosystem on Earth and are the most numerous type of biological entity.^{[272][273][274][275][276]} Viruses lack independent metabolic activity, protein synthesis machinery, and cellular organization, causing them to be described as self-replicating entities at the edge of life.^{[277][278][279][280][281]} In evolutionary biology, viruses mediate horizontal gene transfer, increasing genetic diversity in a manner analogous to sexual reproduction.^[282][283] Other sub-viral infectious entities include viroids (naked circular RNA molecules that infect plants), satellites, and prions (infectious self-propagating misfolded proteins devoid of nucleic acids).^{[185][284][285]}

Ecology and the Biosphere

Ecology is the study of the distribution and abundance of living organisms and the interactions between organisms and their environment.^{[286][287][288]} Ecological systems are investigated across multiple levels of organization, from individual organisms to populations, ecological communities, ecosystems, and the biosphere.^[289][290]

Ecosystems and Communities

An ecosystem consists of a biological community of interacting organisms (biotic components) coupled with the physical and chemical non-living elements (abiotic components) of their environment, including water, light, radiation, temperature, humidity, atmosphere, acidity, and soil.^{[83][289][291][292][293]} Energy enters ecosystems via solar radiation captured through photosynthesis, passing through living tissues before dissipating as metabolic heat.^{[294][295][296]} Decomposers, including fungi and bacteria, break down organic detritus, returning carbon to the atmosphere and recycling mineral nutrients back to primary producers.^{[295][296][297][298]}

An ecological community is an assemblage of populations of different species coexisting within the same geographic area at the same time.^[299][300] Biological interactions within communities include intraspecific interactions (between individuals of the same species) and interspecific interactions (between different species).^{[300][301][302]} Long-term interactions are termed symbiosis, which ranges from mutualism (benefiting both participants) and commensalism to parasitism and interspecific competition.^{[301][302][303]} Community feeding relationships form food chains and food webs organized into trophic levels: primary producers (autotrophs) occupy the base; primary consumers (herbivores) consume autotrophs; secondary and tertiary consumers (carnivores) prey on other consumers; and omnivores feed across multiple levels.^{[83][85][108][109][304][305][306][307]} On average, only about 10% of the energy captured in one trophic level is incorporated into the biomass of the next level, while approximately 90% is dissipated as metabolic heat or utilized by decomposers.^{[83][85][308]}

Population Ecology and Carrying Capacity

A population is a group of conspecific individuals occupying a specified area and reproducing across generations.^{[2][76][83][85][309][310][311][312][313][314][315][316]} Population size is determined by multiplying population density by geographic area or volume.^[83][312] The carrying capacity of an environment represents the maximum population size of a species that can be sustained by available resources, including food, habitat, and water.^{[317][318][319]} Carrying capacity changes with environmental variations, resource availability, and maintenance costs.^[83][312] In human populations, technological innovations such as the Green Revolution increased agricultural productivity, raising Earth's human carrying capacity and countering historical predictions of imminent population collapse formulated by Thomas Malthus in the eighteenth century.^{[83][85][312]}

The Biosphere and Biogeochemical Cycles

In the global biosphere, matter exists in interacting compartments that are classified as biotic or abiotic, and as accessible or inaccessible based on physical state and location.^{[83][85][320]} For example, organic carbon in living autotrophs is biotic and accessible to other organisms, whereas carbon locked in deep sedimentary rocks is abiotic and inaccessible.^[83][85] Biogeochemical cycles represent pathways through which chemical elements move continuously between the biotic compartments of the biosphere and the abiotic compartments of the lithosphere, atmosphere, and hydrosphere, notably in the global cycles of water, carbon, and nitrogen.^{[83][85][320][321]}

Conservation Biology

Conservation biology is the scientific discipline dedicated to protecting Earth's biodiversity, habitats, and ecosystems from excessive extinction rates and the erosion of ecological interactions.^{[322][323][324][325][326][327]} It investigates factors affecting the maintenance, loss, and restoration of biodiversity and the preservation of evolutionary processes generating genetic, population, species, and ecosystem diversity.^{[328][329][330][331][332][333][334]} Scientific estimates warn that up to 50% of extant species on Earth could face extinction within the next 50 years, which would exacerbate poverty and hunger while resetting evolutionary trajectories.^{[335][336][337][338][339][340][341]} Conservation biologists conduct monitoring and educational programs to support conservation action plans at local, regional, and international scales.^[342][343]

Unsolved Problems in Biology

Despite substantial discoveries in modern life sciences, fundamental questions remain unresolved.^{[344][345][346]} One unresolved problem concerns the primary evolutionary adaptation of sexual reproduction and homologous meiotic recombination in eukaryotes.^{[344][345][346][347]} One hypothesis posits that sex evolved primarily to increase genetic variation across generations, whereas an alternative perspective maintains that sex evolved to promote recombinational DNA repair in the germline, with genetic diversification functioning as an evolutionary byproduct.^{[344][345][346][347][348][349][350][351][352][353]}

Another unsolved biological question involves the underlying cause and mechanisms of biological aging (senescence), where multiple competing theories exist without scientific consensus.^{[354][355][356]} and the molecular mechanisms controlling complex biological pattern formation, such as the developmental regulation of stripes on zebras and coral snakes.^[357]

References

1. Modell, Harold; Cliff, William; Michael, Joel; McFarland, Jenny; Wenderoth, Mary Pat; Wright, Ann (December 2015). "A physiologist's view of homeostasis". Advances in Physiology Education. 39 (4): 259–266. doi:10.1152/advan.00107.2015. PMC 4669363. PMID 26628646.
2. Urry, Lisa; Cain, Michael; Wasserman, Steven; Minorsky, Peter; Reece, Jane (2017). "Evolution, the themes of biology, and scientific inquiry". Campbell Biology (11. bas.). New York: Pearson. ss. 2-26. ISBN 978-0134093413.
3. Modell, Harold; Cliff, William; Michael, Joel; McFarland, Jenny; Wenderoth, Mary Pat; Wright, Ann (dezembro de 2015). «A physiologist's view of homeostasis». Advances in Physiology Education. 39 (4): 259–266. ISSN 1043-4046. PMC 4669363. PMID 26628646. doi:10.1152/advan.00107.2015 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC4669363
4. Davies, P. C.; Rieper, E.; Tuszynski, J. A. (January 2013). "Self-organization and entropy reduction in a living cell". Bio Systems. 111 (1): 1–10. Bibcode:2013BiSys.111....1D. doi:10.1016/j.biosystems.2012.10.005. PMC 3712629. PMID 23159919.
5. LOPES, Sônia; ROSSO, Sergio (2005). Biologia: volume único. São Paulo: Saraiva. p. 10. ISBN 978-85-02-05375-5
6. Who coined the term biology?. Info.com. Adalwyd ar 2012-06-03.
7. Richards, Robert J. (2002). The Romantic Conception of Life: Science and Philosophy in the Age of Goethe. University of Chicago Press. ISBN 0-226-71210-9.
8. “Who coined the term biology?”. 《Info.com》. 2013년 5월 9일에 원본 문서에서 보존된 문서. 2012년 6월 3일에 확인함.
9. "biology". Oxford English Dictionary (online ed.). Oxford University Press. (Subscription or participating institution membership required.)
10. «biology, n.», Oxford University Press, Oxford English Dictionary online version, setembro de 2011, consultado em 1 de novembro de 2011
11. "biology, n.". OED Online. 2019. Oxford University Press. Physiology therefore—or more strictly biology—by which I mean the doctrine of the living system in all its states, appears to be the foundation of ethics and pneumatology.
12. biology. Geiriadur Saesneg Rhydychen. Adalwyd ar 2017-11-15.
13. Mayr, Ernst (1982). The Growth of Biological Thought: Diversity, Evolution, and Inheritance. Harvard University Press. p. 108. ISBN 978-0-674-36446-2. Retrieved 29 May 2025.
14. Junker Geschichte der Biologie, p8.
15. Coleman, Biology in the Nineteenth Century, pp 1–2.
16. Richards, Robert J. (2002). The Romantic Conception of Life: Science and Philosophy in the Age of Goethe (Quan niệm Lãng mạn về Sự sống: Khoa học và Triết học trong Thời đại Goethe). Ấn bản Đại học Chicago. ISBN 978-0-226-71210-9.
17. Richards, Robert J. (2002). 《The Romantic Conception of Life: Science and Philosophy in the Age of Goethe》. University of Chicago Press. ISBN 978-0-226-71210-9.
18. Lindberg, David C. (2007). "Science before the Greeks". The beginnings of Western science: the European Scientific tradition in philosophical, religious, and institutional context (2nd ed.). Chicago, Illinois: University of Chicago Press. pp. 1–20. ISBN 978-0-226-48205-7.
19. Grant, Edward (2007). "Ancient Egypt to Plato". A History of Natural Philosophy: From the Ancient World to the Nineteenth Century. New York: Cambridge University Press. pp. 1–26. ISBN 978-052-1-68957-1.
20. Lindberg, David C. (2007). "Science before the Greeks". The beginnings of Western science: the European Scientific tradition in philosophical, religious, and institutional context (Second bas.). Chicago, Illinois: University of Chicago Press. ss. 1-20. ISBN 978-0-226-48205-7.
21. Grant, Edward (2007). "Ancient Egypt to Plato". A History of Natural Philosophy: From the Ancient World to the Nineteenth Century (First bas.). New York, New York: Cambridge University Press. ss. 1-26. ISBN 978-052-1-68957-1.
22. Handbook of the Historiography of Biology. Historiographies of Science. 2021. doi:10.1007/978-3-319-90119-0. ISBN 978-3-319-90118-3.
23. Magner, Lois N. (2002). A History of the Life Sciences, Revised and Expanded. CRC Press. ISBN 978-0-203-91100-6. Archived from the original on 2015-03-24.
24. Serafini, Anthony (2013). The Epic History of Biology. Springer. ISBN 978-1-4899-6327-7. Archived from the original on 15 April 2021. Retrieved 14 July 2015.
25. "Dabaszinātnes", R.: Avots, 2008, 89.lpp., ISBN 978-9984-800-62-2
26. "Theophrastus". Bách khoa Britannica (tái bản lần thứ 11). Nhà xuất bản Đại học Cambridge.
27. 본 문서에는 현재 퍼블릭 도메인에 속한 브리태니커 백과사전 제11판의 내용을 기초로 작성된 내용이 포함되어 있습니다.
28. Magner, A History of the Life Sciences
29. Morange, Michel. 2021. A History of Biology. Princeton, NJ: Princeton University Press. Translated by Teresa Lavender Fagan and Joseph Muise.
30. Önceki cümlelerden bir veya daha fazlası artık kamu malı olan bir yayından alınan metni içeriyor: Chisholm, Hugh, (Ed.) (1911). "Theophrastus". Encyclopædia Britannica (11. bas.). Cambridge University Press.
31. 『岩波生物学事典』【生物学】
32. One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Theophrastus". Encyclopædia Britannica (11th ed.). Cambridge University Press.
33. Fahd, Toufic (1996). «Botany and agriculture». In: Morelon, Régis; Rashed, Roshdi. Encyclopedia of the History of Arabic Science. 3. [S.l.]: Routledge. ISBN 978-0-415-12410-2
34. Fahd, Toufic (1996). "Botany and agriculture". Morelon, Régis; Rashed, Roshdi (Ed.). Encyclopedia of the History of Arabic Science. 3. Routledge. s. 815. ISBN 978-0-415-12410-2.
35. Fahd, Toufic (1996). "Thực vật học và nông nghiệp". In Morelon, Régis; Rashed, Roshdi. Encyclopedia of the History of Arabic Science (Bách khoa lịch sử khoa học Arab) 3. Routledge. p. 815. ISBN 978-0-415-12410-2.
36. Mehmet Bayrakdar, "Al-Jahiz And the Rise of Biological Evolutionism", The Islamic Quarterly, Third Quarter, 1983, London.
37. Fahd, Toufic. Botany and agriculture // с. 815., in Morelon, Régis, Rashed, Roshdi. Encyclopedia of the History of Arabic Science. Т. 3. Routledge, 1996. ISBN 0415124107.
38. Fahd, Toufic (1996). "Botany and agriculture". In Morelon, Régis; Rashed, Roshdi (eds.). Encyclopedia of the History of Arabic Science. Vol. 3. Routledge. p. 815. ISBN 978-0-415-12410-2.
39. Fahd, Toufic (1996). 〈Botany and agriculture〉. Morelon, Régis; Rashed, Roshdi (편집). 《Encyclopedia of the History of Arabic Science》 3. Routledge. 815쪽. ISBN 978-0-415-12410-2.
40. Fahd, Toufic. "Botany and agriculture". p. 815. , in Morelon, Régis & Roshdi Rashed (1996), Encyclopedia of the History of Arabic Science, vol. 3, Routledge, ISBN 0-415-12410-7
41. Insights into Neurologic Localization by Al-Razi (Rhazes), a Medieval Islamic Physician. Muslim Heritage. Adalwyd ar 2017-11-16.
42. William Coleman. Biology in the nineteenth century: problems of form, function, and transformation. History of science. Cambridge New York : Cambridge University Press, 1999. ISBN 978-0-521-29293-1.
43. 生化学辞典第2版、p.725 【生物学】
44. Magner, Lois N. (2002). 《A History of the Life Sciences, Revised and Expanded》. CRC Press. 133–44쪽. ISBN 978-0-203-91100-6. 2015년 3월 24일에 원본 문서에서 보존된 문서.
45. Mayr, Ernst. The Growth of Biological Thought, chapter 4
46. Mayr, Ernst. The Growth of Biological Thought, chapter 7
47. Mayr, Ernst. The Growth of Biological Thought (Sự phát triển của tư duy sinh học) chương 4
48. Mayr, Ernst. The Growth of Biological Thought (Sự phát triển của tư duy sinh học) chương 7
49. Mayr, The Growth of Biological Thought, chapter 7
50. Sapp, Jan (2003). "7". Genesis: The Evolution of Biology. New York: Oxford University Press. ISBN 978-0-19-515618-8.
51. Sapp, Jan (2003). "7". Genesis: The Evolution of Biology. New York: Oxford University Press. ISBN 978-0-19-515618-8.
52. Paul Diepgen, Heinz Goerke: Aschoff/Diepgen/Goerke: Kurze Übersichtstabelle zur Geschichte der Medizin. 7., neubearbeitete Auflage. Springer, Berlin/Göttingen/Heidelberg 1960, S. 35 und 41.
53. Coleman, William (1977). Biology in the Nineteenth Century: Problems of Form, Function, and Transformation (Sinh học thế kỷ 19: Vấn đề của hình thái, chức năng và biến đổi) New York: Cambridge University Press. ISBN 978-0-521-29293-1.
54. Coleman, William (1977). Biology in the Nineteenth Century: Problems of Form, Function, and Transformation. New York: Cambridge University Press. ISBN 978-0-521-29293-1.
55. Coleman, William (1977). Biology in the Nineteenth Century: Problems of Form, Function, and Transformation. New York: Cambridge University Press. ISBN 978-0-521-29293-1.
56. Gould, Stephen Jay. The Structure of Evolutionary Theory. The Belknap Press of Harvard University Press: Cambridge, 2002. ISBN 0-674-00613-5. p. 187.
57. Gould, Stephen Jay. The Structure of Evolutionary Theory. The Belknap Press of Harvard University Press: Cambridge, 2002. 0-674-00613-5. p. 187.
58. Gould, Stephen Jay. The Structure of Evolutionary Theory (Cấu trúc của lý thuyết tiến hóa) The Belknap Press of Harvard University Press: Cambridge, 2002. ISBN 0-674-00613-5. tr. 187.
59. Lamarck (1914)
60. Stephen Jay Gould. The Structure of Evolutionary Theory. The Belknap Press of Harvard University Press: Cambridge, 2002. ISBN 0-674-00613-5. p. 187.
61. Darwin, Francis, ed. (1909). The foundations of The origin of species, a sketch written in 1842 (PDF). Cambridge: Printed at the University Press. p. 53. doi:10.5962/bhl.title.168964. LCCN 61057537. OCLC 871844563. Archived (PDF) from the original on 4 March 2016. Retrieved 27 November 2014.
62. Mayr, Ernst. The Growth of Biological Thought, chapter 10: "Darwin's evidence for evolution and common descent"; and chapter 11: "The causation of evolution: natural selection"
63. Larson, Edward J. (2006). "Ch. 3". Evolution: The Remarkable History of a Scientific Theory (Tiến hóa: Lịch sử đáng chú ý về lý thuyết khoa học) Random House Publishing Group. ISBN 978-1-58836-538-5.
64. Larson, Edward J. (2006). "Ch. 3". Evolution: The Remarkable History of a Scientific Theory. Random House Publishing Group. ISBN 978-1-58836-538-5. Archived from the original on 2015-03-24.
65. Henig (2000). Op. cit. pp. 134–138.
66. Miko, Ilona (2008). "Gregor Mendel's principles of inheritance form the cornerstone of modern genetics. So just what are they?". Nature Education. 1 (1): 134. Archived from the original on 2019-07-19. Retrieved 2021-05-13.
67. Futuyma, Douglas J.; Kirkpatrick, Mark (2017). "Evolutionary Biology". Evolution (4th ed.). Sunderland, Mass.: Sinauer Associates. pp. 3–26.
68. Futuyma, Douglas J.; Kirkpatrick, Mark (2017). "Evolutionary Biology". Evolution (4. bas.). Sunderland, Mass.: Sinauer Associates. ss. 3-26.
69. Noble, Ivan (14 Nisan 2003). "Human genome finally complete". BBC News. 14 Haziran 2006 tarihinde kaynağından arşivlendi. Erişim tarihi: 22 Temmuz 2006.
70. (1944) Studies on the Chemical Nature of the Substance Inducing Transformation of Pneumococcal Types: Induction of Transformation by a Deoxyribonucleic Acid Fraction Isolated from Pneumococcus Type III, Journal of Experimental Medicine, Cyfrol 79, Rhifyn 2, tud. 137-158. DOI:10.1084/jem.79.2.137
71. (1952) Independent functions of viral protein and nucleic acid in growth of bacteriophage, Journal of Genetic Physiology, Cyfrol 36, Rhifyn 1, tud. 29-56. DOI:10.1085/jgp.36.1.39. URL
72. Brenda Maddox: Rosalind Franklin. Die Entdeckung der DNA oder der Kampf einer Frau um wissenschaftliche Anerkennung. Campus, Frankfurt am Main 2003, ISBN 3-593-37192-8.
73. Noble, Ivan (2003년 4월 14일). “Human genome finally complete”. 《BBC News》. 2006년 6월 14일에 원본 문서에서 보존된 문서. 2006년 7월 22일에 확인함.
74. Noble, Ivan (2003-04-14). "BBC NEWS". BBC News. http://news.bbc.co.uk/1/hi/sci/tech/2940601.stm។ បានយកមក 2006-07-22.
75. Urry, Lisa; Cain, Michael; Wasserman, Steven; Minorsky, Peter; Reece, Jane (2017). «The chemical context of life». Campbell Biology 11th ed. New York: Pearson. pp. 28–43. ISBN 978-0-13-409341-3
76. Urry, Lisa; Cain, Michael; Wasserman, Steven; Minorsky, Peter; Reece, Jane (2017). "The chemical context of life". Campbell Biology (11th ed.). New York: Pearson. pp. 28–43. ISBN 978-0-13-409341-3.
77. Freeman, Scott; Quillin, Kim; Allison, Lizabeth; Black, Michael; Podgorski, Greg; Taylor, Emily; Carmichael, Jeff (2017). "Water and carbon: The chemical basis of life". Biological Science (6. bas.). Hoboken, N.J.: Pearson. ss. 55-77. ISBN 978-0321976499.
78. Freeman, Scott; Quillin, Kim; Allison, Lizabeth; Black, Michael; Podgorski, Greg; Taylor (2017). «Water and carbon: The chemical basis of life». Biological Science 6th ed. Hoboken, N.J.: Pearson. pp. 55–77. ISBN 978-0-321-97649-9
79. Urry, Lisa; Cain, Michael; Wasserman, Steven; Minorsky, Peter; Reece, Jane (2017). «Carbon and the molecular diversity of life». Campbell Biology 11th ed. New York: Pearson. pp. 56–65. ISBN 978-0-13-409341-3
80. "Ionic bond". IUPAC Compendium of Chemical Terminology. 2009. doi:10.1351/goldbook.IT07058. ISBN 978-0-9678550-9-7.
81. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). "Carbon and molecular diversity of life". Principles of Life (2nd ed.). Sunderland, Massachusetts: Sinauer Associates. pp. 56–65. ISBN 978-1-4641-7512-1.
82. Freeman, Scott; Quillin, Kim; Allison, Lizabeth; Black, Michael; Podgorski, Greg; Taylor, Emily; Carmichael, Jeff (2017). "Water and carbon: The chemical basis of life". Biological Science (6th ed.). Hoboken, N.J.: Pearson. pp. 55–77. ISBN 978-0-321-97649-9.
83. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). "Carbon and molecular diversity of life". Principles of Life (2. bas.). Sunderland, Mass.: Sinauer Associates. ss. 56-65. ISBN 978-1464175121.
84. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «Carbon and molecular diversity of life». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 56–65. ISBN 978-1-4641-7512-1
85. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). Carbon and molecular diversity of life. Principles of Life (вид. 2nd). Sunderland, Massachusetts: Sinauer Associates. с. 56–65. ISBN 978-1-4641-7512-1.
86. Freeman, Scott; Quillin, Kim; Allison, Lizabeth; Black, Michael; Podgorski, Greg; Taylor (2017). «Protein structure and function». Biological Science 6th ed. Hoboken, N.J.: Pearson. pp. 78–92. ISBN 978-0-321-97649-9
87. Urry, Lisa; Cain, Michael; Wasserman, Steven; Minorsky, Peter; Reece, Jane (2017). «The structure and function of large biological molecules». Campbell Biology 11th ed. New York: Pearson. pp. 66–92. ISBN 978-0-13-409341-3
88. Freeman, Scott; Quillin, Kim; Allison, Lizabeth; Black, Michael; Podgorski, Greg; Taylor (2017). «An introduction to carbohydrate». Biological Science 6th ed. Hoboken, N.J.: Pearson. pp. 107–118. ISBN 978-0-321-97649-9
89. Freeman, Scott; Quillin, Kim; Allison, Lizabeth; Black, Michael; Podgorski, Greg; Taylor (2017). «Lipids, membranes, and the first cells». Biological Science 6th ed. Hoboken, N.J.: Pearson. pp. 119–141. ISBN 978-0-321-97649-9
90. Freeman, Scott; Quillin, Kim; Allison, Lizabeth; Black, Michael; Podgorski, Greg; Taylor (2017). «Nucleic acids and the RNA world». Biological Science 6th ed. Hoboken, N.J.: Pearson. pp. 93–106. ISBN 978-0-321-97649-9
91. Mazzarello, P. (May 1999). "A unifying concept: the history of cell theory". Nature Cell Biology. 1 (1): E13-15. doi:10.1038/8964. PMID 10559875.
92. Mazzarello, P. (maio de 1999). «A unifying concept: the history of cell theory». Nature Cell Biology. 1 (1): E13–15. PMID 10559875. doi:10.1038/8964 | //www.ncbi.nlm.nih.gov/pubmed/10559875
93. Mazzarello، P. (مايو 1999). "A unifying concept: the history of cell theory". Nature Cell Biology. ج. 1 ع. 1: E13–15. DOI:10.1038/8964. PMID:10559875. S2CID:7338204.
94. Campbell, Neil A.; Williamson, Brad; Heyden, Robin J. (2006). Biology: Exploring Life. Boston: Pearson Prentice Hall. ISBN 9780132508827. 2 Kasım 2014 tarihinde kaynağından arşivlendi. Erişim tarihi: 13 Mayıs 2021.
95. Urry, Lisa; Cain, Michael; Wasserman, Steven; Minorsky, Peter; Reece, Jane (2017). «Membrane structure and function». Campbell Biology 11th ed. New York: Pearson. pp. 126–142. ISBN 978-0-13-409341-3
96. Alberts, B.; Johnson, A.; Lewis, J.; ve diğerleri. (2002). Molecular Biology of the Cell (4. bas.). New York: Garland Science. ISBN 978-0-8153-3218-3. 20 Aralık 2017 tarihinde kaynağından arşivlendi.
97. Tom Herrmann; Sandeep Sharma (2 Mart 2019). "Physiology, Membrane". StatPearls. PMID 30855799. 17 Şubat 2022 tarihinde kaynağından arşivlendi14 Mayıs 2021.
98. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «Cells: The working units of life». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 60–81. ISBN 978-1-4641-7512-1
99. Hans Kornberg (27 de novembro de 2025). «Metabolism». Enciclopédia Britânica. Consultado em 7 de dezembro de 2025
100. "Learn About the 3 Main Stages of Cellular Respiration". ThoughtCo (İngilizce). 14 Ekim 2017 tarihinde kaynağından arşivlendi. Erişim tarihi: 20 Mart 2023.
101. Lodish, Harvey; Berk, Arnold.; Kaiser, Chris A.; Krieger, Monty; Scott, Matthew P.; Bretscher (2008). «Cellular energetics». Molecular Cell Biology 6th ed. New York: W.H. Freeman and Company. pp. 479–532. ISBN 978-0-7167-7601-7
102. Lodish, Harvey; Berk, Arnold.; Kaiser, Chris A.; Krieger, Monty; Scott, Matthew P.; Bretscher, Anthony; Ploegh, Hidde; Matsudaira, Paul (2008). "Cellular energetics". Molecular Cell Biology (6. bas.). New York: W.H. Freeman and Company. ss. 479-532. ISBN 978-0716776017.
103. "photosynthesis". Online Etymology Dictionary. 7 Mart 2013 tarihinde kaynağından arşivlendi. Erişim tarihi: 23 Mayıs 2013.
104. "Henry George Liddell, Robert Scott, A Greek-English Lexicon, φῶς". perseus.tufts.edu. 19 Ekim 2014 tarihinde kaynağından arşivlendi. Erişim tarihi: 17 Mart 2023.
105. "Henry George Liddell, Robert Scott, A Greek-English Lexicon, σύν-θεσις". perseus.tufts.edu. 14 Haziran 2014 tarihinde kaynağından arşivlendi. Erişim tarihi: 17 Mart 2023.
106. φῶς. Liddell, Henry George; Scott, Robert; A Greek–English Lexicon no Perseus Project
107. σύνθεσις. Liddell, Henry George; Scott, Robert; A Greek–English Lexicon no Perseus Project
108. Bryant, D. A.; Frigaard, N. U. (Nov 2006). "Prokaryotic photosynthesis and phototrophy illuminated". Trends in Microbiology. 14 (11): 488-496. doi:10.1016/j.tim.2006.09.001. PMID 16997562.
109. Bryant, D. A.; Frigaard, N. U. (novembro de 2006). «Prokaryotic photosynthesis and phototrophy illuminated». Trends in Microbiology. 14 (11): 488–496. PMID 16997562. doi:10.1016/j.tim.2006.09.001 | //www.ncbi.nlm.nih.gov/pubmed/16997562
110. Reece, J.; Urry, L.; Cain, M. (2011). Biology (International bas.). Upper Saddle River, New Jersey: Pearson Education. ss. 235, 244. ISBN 978-0-321-73975-9. This initial incorporation of carbon into organic compounds is known as carbon fixation.
111. Neitzel, James; Rasband, Matthew. "Cell communication". Nature Education. 29 Eylül 2010 tarihinde kaynağından arşivlendi29 Mayıs 2021.
112. "Cell signaling". Nature Education. 31 Ekim 2010 tarihinde kaynağından arşivlendi29 Mayıs 2021.
113. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «Cell membranes and signaling». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 82–104. ISBN 978-1-4641-7512-1
114. Martin, E. A.; Hine, R. (2020). A dictionary of biology (6. bas.). Oxford: Oxford University Press. ISBN 9780199204625. OCLC 176818780.
115. Martin, E. A.; Hine, R. (2020). A dictionary of biology 6th ed. Oxford: Oxford University Press. ISBN 978-0-19-920462-5. OCLC 176818780 | //www.worldcat.org/oclc/176818780
116. Griffiths, A. J. (2012). Introduction to genetic analysis (10. bas.). New York: W.H. Freeman. ISBN 9781429229432. OCLC 698085201.
117. Griffiths, A. J. (2012). Introduction to genetic analysis 10th ed. New York: W.H. Freeman. ISBN 978-1-4292-2943-2. OCLC 698085201 | //www.worldcat.org/oclc/698085201
118. "10.2 The Cell Cycle - Biology 2e | OpenStax". openstax.org (İngilizce). 29 Kasım 2020 tarihinde kaynağından arşivlendi. Erişim tarihi: 24 Kasım 2020.
119. Freeman, Scott; Quillin, Kim; Allison, Lizabeth; Black, Michael; Podgorski, Greg; Taylor (2017). «Meiosis». Biological Science 6th ed. Hoboken, New Jersey: Pearson. pp. 271–289. ISBN 978-0-321-97649-9
120. Casiraghi, A.; Suigo, L.; Valoti, E.; Straniero, V. (February 2020). "Targeting Bacterial Cell Division: A Binding Site-Centered Approach to the Most Promising Inhibitors of the Essential Protein FtsZ". Antibiotics. 9 (2): 69. doi:10.3390/antibiotics9020069. PMC 7167804 . PMID 32046082. | //www.ncbi.nlm.nih.gov/pmc/articles/PMC7167804
121. Casiraghi, A.; Suigo, L.; Valoti, E.; Straniero, V. (fevereiro de 2020). «Targeting Bacterial Cell Division: A Binding Site-Centered Approach to the Most Promising Inhibitors of the Essential Protein FtsZ». Antibiotics. 9 (2): 69. PMC 7167804. PMID 32046082. doi:10.3390/antibiotics9020069 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC7167804
122. Brandeis M. New-age ideas about age-old sex: separating meiosis from mating could solve a century-old conundrum. Biol Rev Camb Philos Soc. 2018 May;93(2):801–810. doi: 10.1111/brv.12367. Epub 2017 Sep 14. PMID 28913952 | //www.ncbi.nlm.nih.gov/pubmed/28913952?dopt=Abstract
123. Hörandl E. Apomixis and the paradox of sex in plants. Ann Bot. 2024 Mar 18:mcae044. doi: 10.1093/aob/mcae044. Epub ahead of print. PMID 38497809 | //www.ncbi.nlm.nih.gov/pubmed/38497809?dopt=Abstract
124. Bernstein H, Byerly HC, Hopf FA, Michod RE. Genetic damage, mutation, and the evolution of sex. Science. 1985 Sep 20;229(4719):1277–81. doi: 10.1126/science.3898363. PMID 3898363 | //www.ncbi.nlm.nih.gov/pubmed/3898363?dopt=Abstract
125. Darwin, C. R. 1878. The effects of cross and self fertilisation in the vegetable kingdom. London: John Murray. darwin-online.org.uk
126. Griffiths, Anthony J.; Wessler, Susan R.; Carroll, Sean B.; Doebley, John (2015). "The genetics revolution". An Introduction to Genetic Analysis (11th ed.). Sunderland, Massachusetts: W.H. Freeman & Company. pp. 1–30. ISBN 978-1-4641-0948-5.
127. Griffiths, Anthony J. F.; Miller, Jeffrey H.; Suzuki, David T.; Lewontin, Richard C.; Gelbart, William M., eds. (2000). "Genetics and the Organism: Introduction". An Introduction to Genetic Analysis (7th ed.). New York: W. H. Freeman. ISBN 978-0-7167-3520-5.
128. Hartl, D.; Jones, E (2005). Genetics: Analysis of Genes and Genomes (6th ed.). Jones & Bartlett. ISBN 978-0-7637-1511-3.
129. Griffiths, Anthony J.; Wessler, Susan R.; Carroll, Sean B.; Doebley, John (2015). "The genetics revolution". An Introduction to Genetic Analysis (11. bas.). Sunderland, Massachusetts: W.H. Freeman & Company. ss. 1-30. ISBN 978-1464109485.
130. Griffiths; Miller; Suzuki; Lewontin; Gelbart, eds. (2000). «Genetics and the Organism: Introduction». An Introduction to Genetic Analysis 7th ed. New York: W. H. Freeman. ISBN 978-0-7167-3520-5
131. Miko, Ilona (2008), "Test crosses", Nature Education, 1 (1), s. 136, 21 Mayıs 2021 tarihinde kaynağından arşivlendi28 Mayıs 2021
132. Miko, Ilona (2008). "Thomas Hunt Morgan and sex linkage". Nature Education. 1 (1): 143. Archived from the original on 2021-05-20. Retrieved 2021-05-28.
133. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «DNA and its role in heredity». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 172–193. ISBN 978-1-4641-7512-1
134. Russell, Peter (2001). iGenetics. New York: Benjamin Cummings. ISBN 0-8053-4553-1.
135. Thanbichler, M; Wang, SC; Shapiro, L (October 2005). "The bacterial nucleoid: a highly organized and dynamic structure". Journal of Cellular Biochemistry. 96 (3): 506-21. doi:10.1002/jcb.20519. PMID 15988757.
136. Thanbichler, M; Wang, SC; Shapiro, L (outubro de 2005). «The bacterial nucleoid: a highly organized and dynamic structure». Journal of Cellular Biochemistry. 96 (3): 506–21. PMID 15988757. doi:10.1002/jcb.20519 | //www.ncbi.nlm.nih.gov/pubmed/15988757
137. Thanbichler M, Wang S, Shapiro L (2005). "The bacterial nucleoid: a highly organized and dynamic structure". J Cell Biochem 96 (3): 506–21. DOI:10.1002/jcb.20519.
138. Thanbichler, M; Wang, SC; Shapiro, L (October 2005). “The bacterial nucleoid: a highly organized and dynamic structure”. 《Journal of Cellular Biochemistry》 96 (3): 506–21. doi:10.1002/jcb.20519. PMID 15988757.
139. "Genotype definition – Medical Dictionary definitions". Medterms.com. 19 Mart 2012. 21 Eylül 2013 tarihinde kaynağından arşivlendi. Erişim tarihi: 2 Ekim 2013.
140. “Genotype definition – Medical Dictionary definitions”. Medterms.com. 2012년 3월 19일. 2013년 9월 21일에 원본 문서에서 보존된 문서. 2013년 10월 2일에 확인함.
141. Crick, Francis H. (1958). "On protein synthesis". Symposia of the Society for Experimental Biology. 12: 138-63. PMID 13580867. | //www.ncbi.nlm.nih.gov/pubmed/13580867
142. Crick, Francis H. (August 1970). "Central dogma of molecular biology". Nature. 227 (5258): 561-3. Bibcode:1970Natur.227..561C. doi:10.1038/227561a0. PMID 4913914.
143. "Central dogma reversed". Nature. 226 (5252): 1198-9. June 1970. Bibcode:1970Natur.226.1198.. doi:10.1038/2261198a0. PMID 5422595.
144. Lin, Yihan; Elowitz, Michael B. (2016). "Central Dogma Goes Digital". Molecular Cell. 61 (6): 791-792. doi:10.1016/j.molcel.2016.03.005. PMID 26990983.
145. Crick, Francis H. (Agosto de 1970). «Central dogma of molecular biology». Nature. 227 (5258): 561–3. Bibcode:1970Natur.227..561C. PMID 4913914. doi:10.1038/227561a0
146. «Central dogma reversed». Nature. 226 (5252): 1198–9. Junho de 1970. Bibcode:1970Natur.226.1198.. PMID 5422595. doi:10.1038/2261198a0
147. Lin, Yihan; Elowitz, Michael B. (2016). «Central Dogma Goes Digital». Molecular Cell. 61 (6): 791–792. PMID 26990983. doi:10.1016/j.molcel.2016.03.005 | //www.ncbi.nlm.nih.gov/pubmed/26990983
148. From SemBiosys, A New Kind Of Insulin INSIDE WALL STREET By Gene G. Marcial(AUGUST 13, 2007)
149. "GM Safflower with Human Pro-Insulin". www.i-sis.org.uk (in អង់គ្លេស). Retrieved 2026-04-02.
150. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «Regulation of gene expression». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 215–233. ISBN 978-1-4641-7512-1
151. Keene, Jack D.; Tenenbaum, Scott A. (2002). "Eukaryotic mRNPs may represent posttranscriptional operons". Molecular Cell. 9 (6): 1161-1167. doi:10.1016/s1097-2765(02)00559-2. PMID 12086614.
152. Keene, Jack D.; Tenenbaum, Scott A. (2002). «Eukaryotic mRNPs may represent posttranscriptional operons». Molecular Cell. 9 (6): 1161–1167. PMID 12086614. doi:10.1016/s1097-2765(02)00559-2 | //www.ncbi.nlm.nih.gov/pubmed/12086614
153. Jaenisch, Rudolf; Bird, Adrian (2003-03). "Epigenetic regulation of gene expression: how the genome integrates intrinsic and environmental signals" (en). Nature Genetics 33 (3): 245–254. doi:10.1038/ng1089. ISSN 1546-1718.
154. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «Genes, development, and evolution». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 273–298. ISBN 978-1-4641-7512-1
155. Slack, J.M.W. (2013) Essential Developmental Biology. Wiley-Blackwell, Oxford.
156. Slack, J.M.W. (2007). "Metaplasia and transdifferentiation: from pure biology to the clinic". Nature Reviews Molecular Cell Biology. 8 (5): 369-378. doi:10.1038/nrm2146. PMID 17377526.
157. Atala, Anthony; Lanza, Robert (31 Aralık 2012). Handbook of Stem Cells (İngilizce). Academic Press. s. 452. ISBN 978-0-12-385943-3. 12 Nisan 2021 tarihinde kaynağından arşivlendi. Erişim tarihi: 28 Mayıs 2021.
158. Yanes, Oscar; Clark, Julie; Wong, Diana M.; Patti, Gary J.; Sánchez-Ruiz, Antonio; Benton, H. Paul; Trauger, Sunia A.; Desponts, Caroline; Ding, Sheng; Siuzdak, Gary (June 2010). "Metabolic oxidation regulates embryonic stem cell differentiation". Nature Chemical Biology. 6 (6): 411-417. doi:10.1038/nchembio.364. PMC 2873061 . PMID 20436487. | //www.ncbi.nlm.nih.gov/pmc/articles/PMC2873061
159. Slack, J.M.W. (2007). «Metaplasia and transdifferentiation: from pure biology to the clinic». Nature Reviews Molecular Cell Biology. 8 (5): 369–378. PMID 17377526. doi:10.1038/nrm2146 | //www.ncbi.nlm.nih.gov/pubmed/17377526
160. Yanes, Oscar; Clark, Julie; Wong, Diana M.; Patti, Gary J.; Sánchez-Ruiz, Antonio; Benton, H. Paul; Trauger, Sunia A.; Desponts, Caroline; Ding, Sheng; Siuzdak, Gary (Junho de 2010). «Metabolic oxidation regulates embryonic stem cell differentiation». Nature Chemical Biology. 6 (6): 411–417. PMC 2873061. PMID 20436487. doi:10.1038/nchembio.364 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC2873061
161. Gilbert, S.F.; Opitz, J.M.; Raff, R.A. (1996). "Resynthesizing Evolutionary and Developmental Biology". Developmental Biology. 173 (2): 357–372. doi:10.1006/dbio.1996.0032. PMID 8605997.
162. Müller, G. B. (2007). "Evo–devo: extending the evolutionary synthesis". Nature Reviews Genetics. 8 (12): 943–949. doi:10.1038/nrg2219. PMID 17984972. S2CID 19264907.
163. Carroll, Sean B. The Origins of Form. Natural History. Процитовано 9 жовтня 2016. Biologists could say, with confidence, that forms change, and that natural selection is an important force for change. Yet they could say nothing about how that change is accomplished. How bodies or body parts change, or how new structures arise, remained complete mysteries.
164. Bürglin, Thomas R. "The Homeobox Page". Karolinska Institutet. Retrieved 13 October 2016.
165. Mārtiņš Vaivads. «Gēni un gēnu proteīni dažādu sejas šķeltņu skartos audos», 2023. Arhivēts no oriģināla, laiks: 2025. gada 10. maijā. Skatīts: 05-05-2025.
166. Hall, Brian K.; Hallgrímsson, Benedikt (6 Aralık 2007). Strickberger's Evolution. Jones & Bartlett Publishers. ss. 4-6. ISBN 978-1-4496-4722-3. 26 Mart 2023 tarihinde kaynağından arşivlendi. Erişim tarihi: 20 Mart 2023.
167. "Evolution Resources". Washington, D.C.: National Academies of Sciences, Engineering, and Medicine. 2016. 3 Haziran 2016 tarihinde kaynağından arşivlendi.
168. Lewontin, Richard C. (November 1970). "The Units of Selection" (PDF). Annual Review of Ecology and Systematics. 1: 1-18. doi:10.1146/annurev.es.01.110170.000245. JSTOR 2096764. 6 Şubat 2015 tarihinde kaynağından arşivlendi (PDF).
169. Darwin, Charles (1859). On the Origin of Species, John Murray.
170. Urry, Lisa; Cain, Michael; Wasserman, Steven; Minorsky, Peter; Reece, Jane (2017). «Descent with modifications: A Darwinian view of life». Campbell Biology 11th ed. New York: Pearson. pp. 466–483. ISBN 978-0-13-409341-3
171. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «Processes of evolution». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 299–324. ISBN 978-1-4641-7512-1
172. ស៊ីមផ៍សុន, ចច ហ្គេយឡដ (1967). The Meaning of Evolution (Second រ.រ.). Yale University Press. ល.ស.ប.អ. 0300009526.
173. Simpson, George Gaylord (1967). The Meaning of Evolution (Second ed.). Yale University Press. ISBN 0-300-00952-6.
174. Simpson, George Gaylord (1967). 《The Meaning of Evolution》 Seco판. Yale University Press. ISBN 978-0-300-00952-1.
175. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «Speciation». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 343–356. ISBN 978-1-4641-7512-1
176. Mallet 1995, tr. 294–299.Lỗi sfn: không có mục tiêu: CITEREFMallet1995 (trợ giúp)
177. «Speciation». National Geographic (angļu). Skatīts: 2025-05-04.
178. «Sympatric speciation». evolution.berkeley.edu. Skatīts: 2025-05-04.
179. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «Reconstructing and using phylogenies». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 325–342. ISBN 978-1-4641-7512-1
180. Kitching, Ian J.; Forey, Peter L.; Williams, David M. (2001). "Cladistics". Levin, Simon A. (Ed.). Encyclopedia of Biodiversity (2. bas.). Elsevier. ss. 33-45. doi:10.1016/B978-0-12-384719-5.00022-8. ISBN 9780123847201. 29 Ağustos 2021 tarihinde kaynağından arşivlendi. Erişim tarihi: 29 Ağustos 2021. )
181. Futuyma, Douglas J.; Kirkpatrick, Mark (2017). «Phylogeny: The unity and diversity of life». Evolution 4th ed. Sunderland, Mass.: Sinauer Associates. pp. 401–429
182. Woese, CR; Kandler, O; Wheelis, ML (June 1990). "Towards a natural system of organisms: proposal for the domains Archaea, Bacteria, and Eucarya". Proceedings of the National Academy of Sciences of the United States of America. 87 (12): 4576-79. Bibcode:1990PNAS...87.4576W. doi:10.1073/pnas.87.12.4576. PMC 54159 . PMID 2112744.
183. Woese, CR; Kandler, O; Wheelis, ML (Junho de 1990). «Towards a natural system of organisms: proposal for the domains Archaea, Bacteria, and Eucarya». Proceedings of the National Academy of Sciences of the United States of America. 87 (12): 4576–79. Bibcode:1990PNAS...87.4576W. PMC 54159. PMID 2112744. doi:10.1073/pnas.87.12.4576 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC54159
184. Woese C, Kandler O, Wheelis M (1990). "Towards a natural system of organisms: proposal for the domains Archaea, Bacteria, and Eukarya". Proc Natl Acad Sci USA 87 (12): 4576–9. DOI:10.1073/pnas.87.12.4576. Retrieved on 2011-08-26.
185. ICTV Virus Taxonomy 2009
186. "80.001 Popsiviroidae - ICTVdB Index of Viruses." (Website.) U.S. National Institutes of Health website. Retrieved on 2009-10-28.
187. "90. Prions - ICTVdB Index of Viruses." (Website.) U.S. National Institutes of Health website. Retrieved on 2009-10-28.
188. "81. Satellites - ICTVdB Index of Viruses." (Website.) U.S. National Institutes of Health website. Retrieved on 2009-10-28.
189. «ICTV Virus Taxonomy 2009». Ictvonline.org. Արխիվացված է օրիգինալից 2013 թ․ հոկտեմբերի 4-ին. Վերցված է 2013 թ․ հոկտեմբերի 2-ին.
190. Index of Viruses – Pospiviroidae (2006). In: ICTVdB – The Universal Virus Database, version 4. Büchen-Osmond, C (Ed), Columbia University, New York, USA. Version 4 is based on Virus Taxonomy, Classification and Nomenclature of Viruses, 8th ICTV Report of the International Committee on Taxonomy of Viruses. Fauquet, CM, Mayo, MA, Maniloff, J, Desselberger, U, and Ball, LA (EDS) (2005) Elsevier/Academic Press, pp. 1259.
191. Prusiner SB; Baldwin M; Collinge J; DeArmond SJ; Marsh R; Tateishi J; Weissmann C. «90. Prions – ICTVdB Index of Viruses». United States National Institutes of Health. Արխիվացված է օրիգինալից 2009 թ․ օգոստոսի 27-ին. Վերցված է 2009 թ․ հոկտեմբերի 28-ին.
192. Mayo MA; Berns KI; Fritsch C; Jackson AO; Leibowitz MJ; Taylor JM. «81. Satellites – ICTVdB Index of Viruses». United States National Institutes of Health. Արխիվացված է օրիգինալից 2009 թ․ մայիսի 1-ին. Վերցված է 2009 թ․ հոկտեմբերի 28-ին.
193. John McNeill (1996-11-04). "The BioCode: Integrated biological nomenclature for the 21st century?". Proceedings of a Mini-Symposium on Biological Nomenclature in the 21st Century.
194. Ahoren Oren (2004). "A proposal for further integration of the cyanobacteria under the Bacteriological Code". Int. J. Syst. Evol. Microbiol. 54 (Pt 5): 1895–1902. DOI:10.1099/ijs.0.03008-0.
195. McNeill, John (1996 թ․ նոյեմբերի 4). «The BioCode: Integrated biological nomenclature for the 21st century?». Proceedings of a Mini-Symposium on Biological Nomenclature in the 21st Century. Արխիվացված է օրիգինալից 2025-05-09-ին. Վերցված է 2017-10-15-ին.
196. «The Draft BioCode (2011)». International Committee on Bionomenclature (ICB).
197. Greuter, W.; Garrity, G.; Hawksworth, D.L.; Jahn, R.; Kirk, P.M.; Knapp, S.; McNeill, J.; Michel, E.; Patterson, D.J.; Pyle, R.; Tindall, B.J. (2011). «Draft BioCode (2011): Principles and rules regulating the naming of organisms». Taxon. 60: 201–212.
198. Hawksworth, David L. (2011). «Introducing the Draft BioCode (2011)». Taxon. 60: 199–200.
199. “The Draft BioCode (2011)”. International Committee on Bionomenclature (ICB). 2013년 6월 13일에 원본 문서에서 보존된 문서.
200. Greuter, W; Garrity, G; Hawksworth, DL; Jahn, R; Kirk, PM; Knapp, S; McNeill, J, Michel, E; Patterson, DJ; Pyle, R; Tindall, BJ (2011). “Draft BioCode (2011): Principles and rules regulating the naming of organisms”. 《Taxon》 60: 201–12. doi:10.1002/tax.601019. 2012년 10월 24일에 원본 문서에서 보존된 문서.
201. Hawksworth, David L (2011). “Introducing the Draft BioCode (2011)”. 《Taxon》 60: 199–200. doi:10.1002/tax.601018. 2012년 10월 24일에 원본 문서에서 보존된 문서.
202. Montévil, M; Mossio, M; Pocheville, A; Longo, G (October 2016). "Theoretical principles for biology: Variation". Progress in Biophysics and Molecular Biology. From the Century of the Genome to the Century of the Organism: New Theoretical Approaches. 122 (1): 36-50. doi:10.1016/j.pbiomolbio.2016.08.005. PMID 27530930. 20 Mart 2018 tarihinde kaynağından arşivlendi.
203. De Duve, Christian (2002). Life Evolving: Molecules, Mind, and Meaning. New York: Oxford University Press. s. 44. ISBN 978-0-19-515605-8.
204. De Duve, Christian (2002). Life Evolving: Molecules, Mind, and Meaning. New York: Oxford University Press. p. 44. ISBN 978-0-19-515605-8
205. Pearce, Ben K.D.; Tupper, Andrew S.; Pudritz, Ralph E.; ve diğerleri. (1 Mart 2018). "Constraining the Time Interval for the Origin of Life on Earth". Astrobiology. 18 (3): 343-364. arXiv:1808.09460 . Bibcode:2018AsBio..18..343P. doi:10.1089/ast.2017.1674. PMID 29570409. | //arxiv.org/abs/1808.09460
206. Futuyma, DJ (2005). Evolution. Sinauer Associates. ISBN 978-0-87893-187-3. OCLC 57311264.
207. Rosing, Minik T. (29 Ocak 1999). "13C-Depleted Carbon Microparticles in >3700-Ma Sea-Floor Sedimentary Rocks from West Greenland". Science. 283 (5402): 674-676. Bibcode:1999Sci...283..674R. doi:10.1126/science.283.5402.674. PMID 9924024.
208. Ohtomo, Yoko; Kakegawa, Takeshi; Ishida, Akizumi; ve diğerleri. (January 2014). "Evidence for biogenic graphite in early Archaean Isua metasedimentary rocks". Nature Geoscience. 7 (1): 25-28. Bibcode:2014NatGe...7...25O. doi:10.1038/ngeo2025.
209. Pearce, Ben K.D.; Tupper, Andrew S.; Pudritz, Ralph E.; et al. (1 de março de 2018). «Constraining the Time Interval for the Origin of Life on Earth». Astrobiology. 18 (3): 343–364. Bibcode:2018AsBio..18..343P. PMID 29570409. arXiv:1808.09460. doi:10.1089/ast.2017.1674
210. Rosing, Minik T. (29 de janeiro de 1999). «13C-Depleted Carbon Microparticles in >3700-Ma Sea-Floor Sedimentary Rocks from West Greenland». Science. 283 (5402): 674–676. Bibcode:1999Sci...283..674R. PMID 9924024. doi:10.1126/science.283.5402.674
211. Ohtomo, Yoko; Kakegawa, Takeshi; Ishida, Akizumi; et al. (janeiro de 2014). «Evidence for biogenic graphite in early Archaean Isua metasedimentary rocks». Nature Geoscience. 7 (1): 25–28. Bibcode:2014NatGe...7...25O. doi:10.1038/ngeo2025
212. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «The history of life on Earth». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 357–376. ISBN 978-1-4641-7512-1
213. "Stratigraphic Chart 2022" (PDF). International Stratigraphic Commission. February 2022. 2 Nisan 2022 tarihinde kaynağından arşivlendi (PDF). Erişim tarihi: 25 Nisan 2022.
214. Nisbet, Euan G.; Fowler, C.M.R. (7 Aralık 1999). "Archaean metabolic evolution of microbial mats". Proceedings of the Royal Society B. 266 (1436): 2375-2382. doi:10.1098/rspb.1999.0934. PMC 1690475 . | //www.ncbi.nlm.nih.gov/pmc/articles/PMC1690475
215. Nisbet, Euan G.; Fowler, C.M.R. (7 de dezembro de 1999). «Archaean metabolic evolution of microbial mats». Proceedings of the Royal Society B. 266 (1436): 2375–2382. Bibcode:1999PBioS.266.2375N. PMC 1690475. doi:10.1098/rspb.1999.0934 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC1690475
216. Knoll, Andrew H.; Javaux, Emmanuelle J.; Hewitt, David; ve diğerleri. (29 Haziran 2006). "Eukaryotic organisms in Proterozoic oceans". Philosophical Transactions of the Royal Society B. 361 (1470): 1023-1038. doi:10.1098/rstb.2006.1843. PMC 1578724 . PMID 16754612. | //www.ncbi.nlm.nih.gov/pmc/articles/PMC1578724
217. Fedonkin, Mikhail A. (31 Mart 2003). "The origin of the Metazoa in the light of the Proterozoic fossil record" (PDF). Paleontological Research. 7 (1): 9-41. doi:10.2517/prpsj.7.9. 26 Şubat 2009 tarihinde kaynağından (PDF) arşivlendi2 Eylül 2008.
218. Knoll, Andrew H.; Javaux, Emmanuelle J.; Hewitt, David; et al. (29 de junho de 2006). «Eukaryotic organisms in Proterozoic oceans». Philosophical Transactions of the Royal Society B. 361 (1470): 1023–1038. PMC 1578724. PMID 16754612. doi:10.1098/rstb.2006.1843 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC1578724
219. Fedonkin, Mikhail A. (31 de março de 2003). «The origin of the Metazoa in the light of the Proterozoic fossil record» (PDF). Paleontological Research. 7 (1): 9–41. Bibcode:2003PalRe...7....9F. doi:10.2517/prpsj.7.9. Consultado em 2 de setembro de 2008. Cópia arquivada (PDF) em 26 de fevereiro de 2009
220. Bonner, John Tyler (7 Ocak 1998). "The origins of multicellularity". Integrative Biology. 1 (1): 27-36. doi:10.1002/(SICI)1520-6602(1998)1:1<27::AID-INBI4>3.0.CO;2-6.
221. Bonner, John Tyler (7 de janeiro de 1998). «The origins of multicellularity». Integrative Biology. 1 (1): 27–36. doi:10.1002/(SICI)1520-6602(1998)1:1<27::AID-INBI4>3.0.CO;2-6
222. Strother, Paul K.; Battison, Leila; Brasier, Martin D.; ve diğerleri. (26 Mayıs 2011). "Earth's earliest non-marine eukaryotes". Nature. 473 (7348): 505-509. Bibcode:2011Natur.473..505S. doi:10.1038/nature09943. PMID 21490597.
223. Beraldi-Campesi, Hugo (23 Şubat 2013). "Early life on land and the first terrestrial ecosystems". Ecological Processes. 2 (1): 1-17. doi:10.1186/2192-1709-2-1.
224. Algeo, Thomas J.; Scheckler, Stephen E. (29 Ocak 1998). "Terrestrial-marine teleconnections in the Devonian: links between the evolution of land plants, weathering processes, and marine anoxic events". Philosophical Transactions of the Royal Society B. 353 (1365): 113-130. doi:10.1098/rstb.1998.0195. PMC 1692181 . | //www.ncbi.nlm.nih.gov/pmc/articles/PMC1692181
225. Strother, Paul K.; Battison, Leila; Brasier, Martin D.; et al. (26 de maio de 2011). «Earth's earliest non-marine eukaryotes». Nature. 473 (7348): 505–509. Bibcode:2011Natur.473..505S. PMID 21490597. doi:10.1038/nature09943
226. Beraldi-Campesi, Hugo (23 de fevereiro de 2013). «Early life on land and the first terrestrial ecosystems». Ecological Processes. 2 (1): 1–17. Bibcode:2013EcoPr...2....1B. doi:10.1186/2192-1709-2-1
227. Algeo, Thomas J.; Scheckler, Stephen E. (29 de janeiro de 1998). «Terrestrial-marine teleconnections in the Devonian: links between the evolution of land plants, weathering processes, and marine anoxic events». Philosophical Transactions of the Royal Society B. 353 (1365): 113–130. PMC 1692181. doi:10.1098/rstb.1998.0195 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC1692181
228. Jun-Yuan, Chen; Oliveri, Paola; Chia-Wei, Li; ve diğerleri. (25 Nisan 2000). "Precambrian animal diversity: Putative phosphatized embryos from the Doushantuo Formation of China". Proc. Natl. Acad. Sci. U.S.A. 97 (9): 4457-4462. Bibcode:2000PNAS...97.4457C. doi:10.1073/pnas.97.9.4457. PMC 18256 . PMID 10781044. | //www.ncbi.nlm.nih.gov/pmc/articles/PMC18256
229. D-G., Shu; H-L., Luo; Conway Morris, Simon; ve diğerleri. (4 Kasım 1999). "Lower Cambrian vertebrates from south China" (PDF). Nature. 402 (6757): 42-46. Bibcode:1999Natur.402...42S. doi:10.1038/46965. 26 Şubat 2009 tarihinde kaynağından (PDF) arşivlendi22 Ocak 2015.
230. Jun-Yuan, Chen; Oliveri, Paola; Chia-Wei, Li; et al. (25 de abril de 2000). «Precambrian animal diversity: Putative phosphatized embryos from the Doushantuo Formation of China». Proc. Natl. Acad. Sci. U.S.A. 97 (9): 4457–4462. Bibcode:2000PNAS...97.4457C. PMC 18256. PMID 10781044. doi:10.1073/pnas.97.9.4457 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC18256
231. D-G., Shu; H-L., Luo; Conway Morris, Simon; et al. (4 de novembro de 1999). «Lower Cambrian vertebrates from south China» (PDF). Nature. 402 (6757): 42–46. Bibcode:1999Natur.402...42S. doi:10.1038/46965. Consultado em 22 de janeiro de 2015. Cópia arquivada (PDF) em 26 de fevereiro de 2009
232. Hoyt, Donald F. (17 Şubat 1997). "Synapsid Reptiles". ZOO 138 Vertebrate Zoology (Lecture). Pomona, Calif.: California State Polytechnic University, Pomona. 20 Mayıs 2009 tarihinde kaynağından arşivlendi. Erişim tarihi: 22 Ocak 2015.
233. Barry, Patrick L. (28 Ocak 2002). Phillips, Tony (Ed.). "The Great Dying". Science@NASA. Marshall Space Flight Center. 10 Nisan 2010 tarihinde kaynağından arşivlendi. Erişim tarihi: 22 Ocak 2015.
234. Hoyt, Donald F. (17 de fevereiro de 1997). «Synapsid Reptiles». ZOO 138 Vertebrate Zoology (Lecture). Pomona, Calif.: California State Polytechnic University, Pomona. Consultado em 22 de janeiro de 2015. Cópia arquivada em 20 de maio de 2009
235. Tanner, Lawrence H.; Lucas, Spencer G.; Chapman, Mary G. (March 2004). "Assessing the record and causes of Late Triassic extinctions" (PDF). Earth-Science Reviews. 65 (1–2): 103-139. Bibcode:2004ESRv...65..103T. doi:10.1016/S0012-8252(03)00082-5. 25 Ekim 2007 tarihinde kaynağından (PDF) arşivlendi22 Ekim 2007.
236. Benton, Michael J. (1997). Vertebrate Palaeontology (2. bas.). Londra: Chapman & Hall. ISBN 978-0-412-73800-5. OCLC 37378512. | //www.worldcat.org/oclc/37378512
237. Tanner, Lawrence H.; Lucas, Spencer G.; Chapman, Mary G. (março de 2004). «Assessing the record and causes of Late Triassic extinctions» (PDF). Earth-Science Reviews. 65 (1–2): 103–139. Bibcode:2004ESRv...65..103T. doi:10.1016/S0012-8252(03)00082-5. Consultado em 22 de outubro de 2007. Cópia arquivada (PDF) em 25 de outubro de 2007
238. Fastovsky, David E.; Sheehan, Peter M. (março de 2005). «The Extinction of the Dinosaurs in North America» (PDF). GSA Today. 15 (3): 4–10. doi:10.1130/1052-5173(2005)015<4:TEOTDI>2.0.CO;2. Consultado em 23 de janeiro de 2015. Cópia arquivada (PDF) em 22 de março de 2019
239. Roach, John (20 Haziran 2007). "Dinosaur Extinction Spurred Rise of Modern Mammals". National Geographic News. Washington, D.C.: National Geographic Society. 11 Mayıs 2008 tarihinde kaynağından arşivlendi. Erişim tarihi: 21 Şubat 2020.
240. Roach, John (20 de junho de 2007). «Dinosaur Extinction Spurred Rise of Modern Mammals». National Geographic News. Washington, D.C.: National Geographic Society. Consultado em 21 de fevereiro de 2020. Cópia arquivada em 11 de maio de 2008 * Wible, John R.; Rougier, Guillermo W.; Novacek, Michael J.; et al. (21 de junho de 2007). «Cretaceous eutherians and Laurasian origin for placental mammals near the K/T boundary». Nature. 447 (7147): 1003–1006. Bibcode:2007Natur.447.1003W. PMID 17581585. doi:10.1038/nature05854
241. Van Valkenburgh, Blaire (1 de maio de 1999). «Major Patterns in the History of Carnivorous Mammals». Annual Review of Earth and Planetary Sciences. 27: 463–493. Bibcode:1999AREPS..27..463V. doi:10.1146/annurev.earth.27.1.463. Consultado em 15 de maio de 2021. Cópia arquivada em 29 de fevereiro de 2020
242. «Mass extinction facts and information from National Geographic». Science (angļu). 2025-05-04. Skatīts: 2025-05-04.
243. «Background extinction rate | biology | Britannica». www.britannica.com (angļu). Skatīts: 2025-05-04.
244. Mora, Camilo; Tittensor, Derek P.; Adl, Sina; Simpson, Alastair G. B.; Worm, Boris; Mace, Georgina M. (23 August 2011). "How Many Species Are There on Earth and in the Ocean?". PLOS Biology 9 (8): e1001127. doi:10.1371/journal.pbio.1001127. PMC 3160336.
245. Numbers of Insects (Species and Individuals). Smithsonian Institution.
246. Proceedings of the National Academy of Sciences, Census of Marine Life (CoML) News.BBC.co.uk
247. Fredrickson, J. K.; Zachara, J. M.; Balkwill, D. L. (July 2004). "Geomicrobiology of high-level nuclear waste-contaminated vadose sediments at the Hanford site, Washington state". Applied and Environmental Microbiology. 70 (7): 4230-41. Bibcode:2004ApEnM..70.4230F. doi:10.1128/AEM.70.7.4230-4241.2004. PMC 444790 . PMID 15240306.
248. Fredrickson, J. K.; Zachara, J. M.; Balkwill, D. L. (Julho de 2004). «Geomicrobiology of high-level nuclear waste-contaminated vadose sediments at the Hanford site, Washington state». Applied and Environmental Microbiology. 70 (7): 4230–41. Bibcode:2004ApEnM..70.4230F. PMC 444790. PMID 15240306. doi:10.1128/AEM.70.7.4230-4241.2004 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC444790
249. Dudek, N. K.; Sun, C. L.; Burstein, D. (2017). «Novel Microbial Diversity and Functional Potential in the Marine Mammal Oral Microbiome» (PDF). Current Biology. 27 (24): 3752–3762. Bibcode:2017CBio...27E3752D. PMID 29153320. doi:10.1016/j.cub.2017.10.040. Consultado em 14 de maio de 2021. Cópia arquivada (PDF) em 8 de março de 2021
250. Pace, N. R. (May 2006). "Time for a change". Nature. 441 (7091): 289. Bibcode:2006Natur.441..289P. doi:10.1038/441289a. PMID 16710401.
251. Pace, N. R. (maio de 2006). «Time for a change». Nature. 441 (7091): 289. Bibcode:2006Natur.441..289P. PMID 16710401. doi:10.1038/441289a
252. Stoeckenius, W. (October 1981). "Walsby's square bacterium: fine structure of an orthogonal procaryote". Journal of Bacteriology. 148 (1): 352-60. doi:10.1128/JB.148.1.352-360.1981. PMC 216199 . PMID 7287626.
253. "Archaea Basic Biology". March 2018. 28 Nisan 2021 tarihinde kaynağından arşivlendi. Erişim tarihi: 14 Mayıs 2021.
254. Stoeckenius, W. (outubro de 1981). «Walsby's square bacterium: fine structure of an orthogonal procaryote». Journal of Bacteriology. 148 (1): 352–60. PMC 216199. PMID 7287626. doi:10.1128/JB.148.1.352-360.1981 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC216199
255. Bang, C.; Schmitz, R. A. (September 2015). "Archaea associated with human surfaces: not to be underestimated". FEMS Microbiology Reviews. 39 (5): 631-48. doi:10.1093/femsre/fuv010. PMID 25907112.
256. Moissl-Eichinger. C.; Pausan, M.; Taffner, J.; Berg, G.; Bang, C.; Schmitz, R. A. (January 2018). "Archaea Are Interactive Components of Complex Microbiomes". Trends in Microbiology. 26 (1): 70-85. doi:10.1016/j.tim.2017.07.004. PMID 28826642.
257. Bang, C.; Schmitz, R. A. (setembro de 2015). «Archaea associated with human surfaces: not to be underestimated». FEMS Microbiology Reviews. 39 (5): 631–48. PMID 25907112. doi:10.1093/femsre/fuv010 | //www.ncbi.nlm.nih.gov/pubmed/25907112
258. Moissl-Eichinger. C.; Pausan, M.; Taffner, J.; Berg, G.; Bang, C.; Schmitz, R. A. (janeiro de 2018). «Archaea Are Interactive Components of Complex Microbiomes». Trends in Microbiology. 26 (1): 70–85. Bibcode:2018TrMic..26...70M. PMID 28826642. doi:10.1016/j.tim.2017.07.004
259. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «The origin and diversification of eukaryotes». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 402–419. ISBN 978-1-4641-7512-1
260. O'Malley, Maureen A.; Leger, Michelle M.; Wideman, Jeremy G.; Ruiz-Trillo, Iñaki (18 Şubat 2019). "Concepts of the last eukaryotic common ancestor". Nature Ecology & Evolution. Springer Science and Business Media LLC. 3 (3): 338-344. doi:10.1038/s41559-019-0796-3. hdl:10261/201794. PMID 30778187.
261. Taylor, F. J. R. 'M. (1 Kasım 2003). "The collapse of the two-kingdom system, the rise of protistology and the founding of the International Society for Evolutionary Protistology (ISEP)". International Journal of Systematic and Evolutionary Microbiology. Microbiology Society. 53 (6): 1707-1714. doi:10.1099/ijs.0.02587-0. PMID 14657097.
262. O'Malley, Maureen A.; Leger, Michelle M.; Wideman, Jeremy G.; Ruiz-Trillo, Iñaki (18 de fevereiro de 2019). «Concepts of the last eukaryotic common ancestor». Springer Science and Business Media LLC. Nature Ecology & Evolution. 3 (3): 338–344. Bibcode:2019NatEE...3..338O. PMID 30778187. doi:10.1038/s41559-019-0796-3
263. Taylor, F. J. R. 'M. (1 de novembro de 2003). «The collapse of the two-kingdom system, the rise of protistology and the founding of the International Society for Evolutionary Protistology (ISEP)». Microbiology Society. International Journal of Systematic and Evolutionary Microbiology. 53 (6): 1707–1714. PMID 14657097. doi:10.1099/ijs.0.02587-0 | //www.ncbi.nlm.nih.gov/pubmed/14657097
264. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «The evolution of plants». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 420–449. ISBN 978-1-4641-7512-1
265. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «The evolution and diversity of fungi». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 451–468. ISBN 978-1-4641-7512-1
266. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «Animal origins and diversity». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 469–519. ISBN 978-1-4641-7512-1
267. Wu, K. J. (15 Nisan 2020). "There are more viruses than stars in the universe. Why do only some infect us? – More than a quadrillion quadrillion individual viruses exist on Earth, but most are not poised to hop into humans. Can we find the ones that are?". National Geographic Society. 28 Mayıs 2020 tarihinde kaynağından arşivlendi. Erişim tarihi: 18 Mayıs 2020.
268. Koonin, E. V.; Senkevich, T. G.; Dolja, V. V. (September 2006). "The ancient Virus World and evolution of cells". Biology Direct. 1 (1): 29. doi:10.1186/1745-6150-1-29. PMC 1594570 . PMID 16984643. | //www.ncbi.nlm.nih.gov/pmc/articles/PMC1594570
269. Zimmer, C. (26 Şubat 2021). "The Secret Life of a Coronavirus - An oily, 100-nanometer-wide bubble of genes has killed more than two million people and reshaped the world. Scientists don't quite know what to make of it". The New York Times. 28 Aralık 2021 tarihinde kaynağından arşivlendi. Erişim tarihi: 28 Şubat 2021.
270. Koonin, E. V.; Senkevich, T. G.; Dolja, V. V. (setembro de 2006). «The ancient Virus World and evolution of cells». Biology Direct. 1 (1): 29. PMC 1594570. PMID 16984643. doi:10.1186/1745-6150-1-29 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC1594570
271. Zimmer, C. (26 de fevereiro de 2021). «The Secret Life of a Coronavirus - An oily, 100-nanometer-wide bubble of genes has killed more than two million people and reshaped the world. Scientists don't quite know what to make of it.». The New York Times. Consultado em 28 de fevereiro de 2021. Cópia arquivada em 28 de dezembro de 2021
272. "Virus Taxonomy: 2019 Release". talk.ictvonline.org. International Committee on Taxonomy of Viruses. 20 Mart 2020 tarihinde kaynağından arşivlendi. Erişim tarihi: 25 Nisan 2020.
273. Lawrence C. M.; Menon S.; Eilers, B. J. (May 2009). "Structural and functional studies of archaeal viruses". The Journal of Biological Chemistry. 284 (19): 12599-603. doi:10.1074/jbc.R800078200. PMC 2675988 . PMID 19158076. | //www.ncbi.nlm.nih.gov/pmc/articles/PMC2675988
274. Edwards, R.A.; Rohwer, F. (June 2005). "Viral metagenomics". Nature Reviews. Microbiology. 3 (6): 504-10. doi:10.1038/nrmicro1163. PMID 15886693.
275. Lawrence C. M.; Menon S.; Eilers, B. J. (maio de 2009). «Structural and functional studies of archaeal viruses». The Journal of Biological Chemistry. 284 (19): 12599–603. PMC 2675988. PMID 19158076. doi:10.1074/jbc.R800078200 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC2675988
276. Edwards, R.A.; Rohwer, F. (junho de 2005). «Viral metagenomics». Nature Reviews. Microbiology. 3 (6): 504–10. PMID 15886693. doi:10.1038/nrmicro1163 | //www.ncbi.nlm.nih.gov/pubmed/15886693
277. Rybicki, E. P. (1990). "The classification of organisms at the edge of life, or problems with virus systematics". South African Journal of Science. 86: 182-86.
278. Koonin, E. V.; Starokadomskyy, P. (October 2016). "Are viruses alive? The replicator paradigm sheds decisive light on an old but misguided question". Studies in History and Philosophy of Biological and Biomedical Sciences. 59: 125-134. doi:10.1016/j.shpsc.2016.02.016. PMC 5406846 . PMID 26965225. | //www.ncbi.nlm.nih.gov/pmc/articles/PMC5406846
279. Rybicki, E. P. (1990). «The classification of organisms at the edge of life, or problems with virus systematics». South African Journal of Science. 86: 182–86
280. Koonin, E. V.; Starokadomskyy, P. (outubro de 2016). «Are viruses alive? The replicator paradigm sheds decisive light on an old but misguided question». Studies in History and Philosophy of Biological and Biomedical Sciences. 59: 125–134. PMC 5406846. PMID 26965225. doi:10.1016/j.shpsc.2016.02.016 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC5406846
281. «The classification of organisms at the edge of life, or problems with virus systematics». South African Journal of Science 86: pp. 182–86. 1990.
282. Canchaya, C.; Fournous, G.; Chibani-Chennoufi, S. (August 2003). "Phage as agents of lateral gene transfer". Current Opinion in Microbiology. 6 (4): 417-24. doi:10.1016/S1369-5274(03)00086-9. PMID 12941415.
283. Canchaya, C.; Fournous, G.; Chibani-Chennoufi, S. (agosto de 2003). «Phage as agents of lateral gene transfer». Current Opinion in Microbiology. 6 (4): 417–24. PMID 12941415. doi:10.1016/S1369-5274(03)00086-9 | //www.ncbi.nlm.nih.gov/pubmed/12941415
284. Rybicki EP (1990). «The classification of organisms at the edge of life, or problems with virus systematics». S Aft J Sci. 86: 182–186.
285. John Maynard Smith, George R. Price: The Logic of Animal Conflict. In: Nature. 246, 1973, S. 15–18, doi:10.1038/246015a0.
286. Begon, M; Townsend, CR; Harper, JL (2006). Ecology: From individuals to ecosystems (4th ed.). Blackwell. ISBN 978-1-4051-1117-1.
287. Begon, M; Townsend, CR; Harper, JL (2006). Ecology: From individuals to ecosystems (4. bas.). Blackwell. ISBN 978-1-4051-1117-1.
288. Begon, M; Townsend, CR; Harper, JL (2006). Ecology: From individuals to ecosystems 4th ed. [S.l.]: Blackwell. ISBN 978-1-4051-1117-1
289. Habitats of the world. New York: Marshall Cavendish. 2004. pp. 238. ល.ស.ប.អ. 978-0-7614-7523-1. http://books.google.com/?id=U-_mlcy8rGgC&pg=PA238.
290. Habitats of the world. New York: Marshall Cavendish. 2004. էջ 238. ISBN 978-0-7614-7523-1.
291. Habitats of the world. New York: Marshall Cavendish. 2004. s. 238. ISBN 978-0-7614-7523-1. 15 Nisan 2021 tarihinde kaynağından arşivlendi. Erişim tarihi: 24 Ağustos 2020.
292. Tansley (1934); Molles (1999), p. 482; Chapin et al. (2002), p. 380; Schulze et al. (2005); p. 400; Gurevitch et al. (2006), p. 522; Smith & Smith 2012, p. G-5
293. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «The distribution of Earth's ecological systems». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 845–863. ISBN 978-1-4641-7512-1
294. Odum, Eugene P (1971). Fundamentals of Ecology (third bas.). New York: Saunders. ISBN 978-0-534-42066-6.
295. Chapin III, F. Stuart; Matson, Pamela A.; Mooney, Harold A. (2002). "The ecosystem concept". Principles of Terrestrial Ecosystem Ecology. New York: Springer. s. 10. ISBN 978-0-387-95443-1.
296. Chapin III, F. Stuart; Matson, Pamela A.; Mooney, Harold A. (2002). «The ecosystem concept». Principles of Terrestrial Ecosystem Ecology. New York: Springer. ISBN 978-0-387-95443-1
297. Odum, Eugene P.; Barrett, Gary W. (2005). Fundamentals of ecology (Edisi 5th ed). Belmont, CA: Thomson Brooks/Cole. ISBN 978-0-534-42066-6.
298. Chapin, F. Stuart; Matson, P. A.; Mooney, Harold A.; Chapin, Melissa C. (2005). Principles of terrestrial ecosystem ecology (Edisi Nachdr.). New York, NY: Springer. ISBN 978-0-387-95443-1.
299. Sanmartín, Isabel (dezembro de 2012). «Historical Biogeography: Evolution in Time and Space». Evolution: Education and Outreach (em inglês). 5 (4): 555–568. ISSN 1936-6434. doi:10.1007/s12052-012-0421-2. hdl:10261/167031 | //www.worldcat.org/issn/1936-6434
300. Sanmartín, Isabel (December 2012). "Historical Biogeography: Evolution in Time and Space". Evolution: Education and Outreach. 5 (4): 555–568. doi:10.1007/s12052-012-0421-2. hdl:10261/167031. ISSN 1936-6434.
301. Wootton, JT; Emmerson, M (2005). "Measurement of Interaction Strength in Nature". Annual Review of Ecology, Evolution, and Systematics. 36: 419-44. doi:10.1146/annurev.ecolsys.36.091704.175535. JSTOR 30033811.
302. Wootton, JT; Emmerson, M (2005). «Measurement of Interaction Strength in Nature». Annual Review of Ecology, Evolution, and Systematics. 36: 419–44. JSTOR 30033811. doi:10.1146/annurev.ecolsys.36.091704.175535 | //www.jstor.org/stable/30033811
303. Wootton, JT; Emmerson, M (2005). "Measurement of Interaction Strength in Nature". Annual Review of Ecology, Evolution, and Systematics. 36: 419–44. doi:10.1146/annurev.ecolsys.36.091704.175535. JSTOR 30033811.
304. Smith, AL (1997). Oxford dictionary of biochemistry and molecular biology. Oxford [Oxfordshire]: Oxford University Press. s. 508. ISBN 978-0-19-854768-6. Photosynthesis – the synthesis by organisms of organic chemical compounds, esp. carbohydrates, from carbon dioxide using energy obtained from light rather than the oxidation of chemical compounds.
305. Edwards, Katrina. "Microbiology of a Sediment Pond and the Underlying Young, Cold, Hydrologically Active Ridge Flank". Woods Hole Oceanographic Institution.
306. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «Ecological and evolutionary consequences within and among species». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 882–897. ISBN 978-1-4641-7512-1
307. Smith, AL (1997). Oxford dictionary of biochemistry and molecular biology. Oxford [Oxfordshire]: Oxford University Press. p. 508. ISBN 978-0-19-854768-6. Photosynthesis – the synthesis by organisms of organic chemical compounds, esp. carbohydrates, from carbon dioxide using energy obtained from light rather than the oxidation of chemical compounds.
308. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «Ecological communities». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 898–915. ISBN 978-1-4641-7512-1
309. "Population". Biology Online. 13 Nisan 2019 tarihinde kaynağından arşivlendi. Erişim tarihi: 5 Aralık 2012.
310. "Definition of population (biology)". Oxford Dictionaries. Oxford University Press. 4 Mart 2016 tarihinde kaynağından arşivlendi. Erişim tarihi: 5 Aralık 2012. a community of animals, plants, or humans among whose members interbreeding occurs
311. Hartl, Daniel (2007). Principles of Population Genetics. Sinauer Associates. s. 45. ISBN 978-0-87893-308-2.
312. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «Populations». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 864–897. ISBN 978-1-4641-7512-1
313. Urry, Lisa; Cain, Michael; Wasserman, Steven; Minorsky, Peter; Reece, Jane (2017). «Population ecology». Campbell Biology 11th ed. New York: Pearson. pp. 1188–1211. ISBN 978-0-13-409341-3
314. «Definition of population (biology)». Oxford Dictionaries. Oxford University Press. Consultado em 5 de dezembro de 2012. Cópia arquivada em 4 de março de 2016. a community of animals, plants, or humans among whose members interbreeding occurs
315. Hartl, Daniel (2007). Principles of Population Genetics. [S.l.]: Sinauer Associates. p. 45. ISBN 978-0-87893-308-2
316. Hartl, Daniel (2007). Principles of Population Genetics. Sinauer Associates. p. 45. ISBN 978-0-87893-308-2.
317. Chapman, Eric J.; Byron, Carrie J. (1 Ocak 2018). "The flexible application of carrying capacity in ecology". Global Ecology and Conservation (İngilizce). 13: e00365. doi:10.1016/j.gecco.2017.e00365.
318. Chapman, Eric J.; Byron, Carrie J. (1 de janeiro de 2018). «The flexible application of carrying capacity in ecology». Global Ecology and Conservation (em inglês). 13. Bibcode:2018GEcoC..1300365C. doi:10.1016/j.gecco.2017.e00365
319. Chapman, Eric J.; Byron, Carrie J. (2018-01-01). "The flexible application of carrying capacity in ecology". Global Ecology and Conservation. 13 e00365. Bibcode:2018GEcoC..1300365C. doi:10.1016/j.gecco.2017.e00365.
320. Hillis, David M.; Sadava, David; Hill, Richard W.; Price, Mary V. (2014). «The distribution of Earth's ecological systems». Principles of Life 2nd ed. Sunderland, Mass.: Sinauer Associates. pp. 916–934. ISBN 978-1-4641-7512-1
321. Riebeek, Holli (16 June 2011). "The Carbon Cycle". Earth Observatory. NASA. 5 March 2016 tarihinde kaynağından arşivlendi. Erişim tarihi: 5 April 2018.
322. Sahney, S.; Benton, M. J (2008). "Recovery from the most profound mass extinction of all time". Proceedings of the Royal Society B: Biological Sciences. 275 (1636): 759–65. doi:10.1098/rspb.2007.1370. PMC 2596898. PMID 18198148.
323. Soulé, Michael E.; Wilcox, Bruce A. (1980). Conservation biology: an evolutionary-ecological perspective. Sunderland, Mass.: Sinauer Associates. ISBN 978-0-87893-800-1.
324. Soulé, Michael E. (1986). "What is Conservation Biology?" (PDF). BioScience. 35 (11). American Institute of Biological Sciences: 727–34. doi:10.2307/1310054. JSTOR 1310054. Archived from the original on 2019-04-12. Retrieved 2021-05-15.
325. Sahney, S.; Benton, M. J (2008). "Recovery from the most profound mass extinction of all time". Proceedings of the Royal Society B: Biological Sciences. 275 (1636): 759-65. doi:10.1098/rspb.2007.1370. PMC 2596898 . PMID 18198148. | //www.ncbi.nlm.nih.gov/pmc/articles/PMC2596898
326. Soulé, Michael E.; Wilcox, Bruce A. (1980). Conservation biology: an evolutionary-ecological perspective. Sunderland, Mass.: Sinauer Associates. ISBN 978-0-87893-800-1.
327. Sahney, S.; Benton, M. J (2008). «Recovery from the most profound mass extinction of all time». Proceedings of the Royal Society B: Biological Sciences. 275 (1636): 759–65. PMC 2596898. PMID 18198148. doi:10.1098/rspb.2007.1370 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC2596898
328. Hunter, Malcolm L. (1996). Fundamentals of conservation biology. Oxford: Blackwell Science. ISBN 978-0-86542-371-8.
329. Meffe, Gary K.; Martha J. Groom (2006). Principles of conservation biology (3rd ed.). Sunderland, Mass.: Sinauer Associates. ISBN 978-0-87893-518-5.
330. Van Dyke, Fred (2008). Conservation biology: foundations, concepts, applications (2nd ed.). New York: Springer-Verlag. doi:10.1007/978-1-4020-6891-1. hdl:11059/14777. ISBN 978-1-4020-6890-4. OCLC 232001738. Archived from the original on 2020-07-27. Retrieved 2021-05-15.
331. Sahney, S.; Benton, M. J.; Ferry, P. A. (2010). "Links between global taxonomic diversity, ecological diversity and the expansion of vertebrates on land". Biology Letters. 6 (4): 544–7. doi:10.1098/rsbl.2009.1024. PMC 2936204. PMID 20106856.
332. Meffe, Gary K.; Martha J. Groom (2006). Principles of conservation biology (3. bas.). Sunderland, Mass.: Sinauer Associates. ISBN 978-0-87893-518-5.
333. Sahney, S.; Benton, M. J.; Ferry, P. A. (2010). "Links between global taxonomic diversity, ecological diversity and the expansion of vertebrates on land". Biology Letters. 6 (4): 544-7. doi:10.1098/rsbl.2009.1024. PMC 2936204 . PMID 20106856. | //www.ncbi.nlm.nih.gov/pmc/articles/PMC2936204
334. Sahney, S.; Benton, M. J.; Ferry, P. A. (2010). «Links between global taxonomic diversity, ecological diversity and the expansion of vertebrates on land». Biology Letters. 6 (4): 544–7. PMC 2936204. PMID 20106856. doi:10.1098/rsbl.2009.1024 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC2936204
335. Koh, Lian Pin; Dunn, Robert R.; Sodhi, Navjot S.; Colwell, Robert K.; Proctor, Heather C.; Smith, Vincent S. (2004). "Species coextinctions and the biodiversity crisis". Science. 305 (5690): 1632–4. Bibcode:2004Sci...305.1632K. doi:10.1126/science.1101101. PMID 15361627.
336. Millennium Ecosystem Assessment (2005). Ecosystems and Human Well-being: Biodiversity Synthesis. World Resources Institute, Washington, D.C. Archived 2019-10-14 at the Wayback Machine
337. Jackson, J. B. C. (2008). "Ecological extinction and evolution in the brave new ocean". Proceedings of the National Academy of Sciences. 105 (Suppl 1): 11458–65. Bibcode:2008PNAS..10511458J. doi:10.1073/pnas.0802812105. PMC 2556419. PMID 18695220.
338. Koh, Lian Pin; Dunn, Robert R.; Sodhi, Navjot S.; Colwell, Robert K.; Proctor, Heather C.; Smith, Vincent S. (2004). "Species coextinctions and the biodiversity crisis". Science. 305 (5690): 1632-4. Bibcode:2004Sci...305.1632K. doi:10.1126/science.1101101. PMID 15361627.
339. Millennium Ecosystem Assessment (2005). Ecosystems and Human Well-being: Biodiversity Synthesis. World Resources Institute, Washington, D.C. "Document 354 Aspx" (PDF). 14 Ekim 2019 tarihinde kaynağından (PDF) arşivlendi. Erişim tarihi: 20 Mart 2023.
340. Jackson, J. B. C. (2008). "Ecological extinction and evolution in the brave new ocean". Proceedings of the National Academy of Sciences. 105 (Suppl 1): 11458-65. Bibcode:2008PNAS..10511458J. doi:10.1073/pnas.0802812105. PMC 2556419 . PMID 18695220. | //www.ncbi.nlm.nih.gov/pmc/articles/PMC2556419
341. Jackson, J. B. C. (2008). «Ecological extinction and evolution in the brave new ocean». Proceedings of the National Academy of Sciences. 105 (Suppl 1): 11458–65. Bibcode:2008PNAS..10511458J. PMC 2556419. PMID 18695220. doi:10.1073/pnas.0802812105 | //www.ncbi.nlm.nih.gov/pmc/articles/PMC2556419
342. Soule, Michael E. (1986). Conservation Biology: The Science of Scarcity and Diversity. Sinauer Associates. s. 584. ISBN 978-0-87893-795-0.
343. Soule, Michael E. (1986). Conservation Biology: The Science of Scarcity and Diversity. [S.l.]: Sinauer Associates. ISBN 978-0-87893-795-0
344. Gerstein, A. C.; Otto, S. P. (2006). «Why have sex? The population genetics of sex and recombination». Biochemical Society Transactions. 34 (4): 519–522. doi:10.1042/BST0340519. PMID 16856849.
345. Otto, SP; Gerstein, AC (August 2006). “Why have sex? The population genetics of sex and recombination”. 《Biochemical Society Transactions》 34 (Pt 4): 519–22. doi:10.1042/BST0340519. PMID 16856849.
346. S. P. Otto, A. C. Gerstein. Why have sex? The population genetics of sex and recombination. Biochemical Society Transactions. 2006-8, 34 (Pt 4): 519–522 [2019-02-12]. ISSN 0300-5127. PMID 16856849. doi:10.1042/BST0340519. （原始内容存档于2020-04-27）.
347. Agrawal, A. F. (2006). «Evolution of Sex: Why Do Organisms Shuffle Their Genotypes?». Current Biology. 16 (17): R696–R704. doi:10.1016/j.cub.2006.07.063. PMID 16950096.
348. Agrawal, AF (September 2006). “Evolution of sex: why do organisms shuffle their genotypes?”. 《Current Biology》 16 (17): R696–704. Bibcode:1996CBio....6.1213A. doi:10.1016/j.cub.2006.07.063. PMID 16950096.
349. Aneil F. Agrawal. Evolution of sex: why do organisms shuffle their genotypes?. Current biology: CB. 2006-09-05, 16 (17): R696–704 [2019-02-13]. ISSN 0960-9822. PMID 16950096. doi:10.1016/j.cub.2006.07.063. （原始内容存档于2019-01-22）.
350. Bernstein, Harris; Bernstein, Carol and Michod, Richard E. (2011). "Meiosis as an Evolutionary Adaptation for DNA Repair". Chapter 19 in DNA Repair. Inna Kruman editor. InTech Open Publisher.
351. Hörandl, Elvira (2013). Meiosis and the Paradox of Sex in Nature, Meiosis, Dr. Carol Bernstein (Ed.), 978-953-51-1197-9, InTech, .
352. Bernstein, Harris; Bernstein, Carol; Michod, Richard E. (2011). 〈Meiosis as an Evolutionary Adaptation for DNA Repair Chapter 19〉. Kruman editor, Inna (편집). 《DNA Repair》. InTech. doi:10.5772/25117. ISBN 978-953-307-697-3. 2013년 6월 16일에 원본 문서에서 보존된 문서.
353. Hörandl, Elvira (2013). 〈Meiosis and the Paradox of Sex in Nature〉. Bernstein, Carol (편집). 《Meiosis》. 《InTech》. doi:10.5772/56542. ISBN 978-953-51-1197-9. 2013년 10월 29일에 원본 문서에서 보존된 문서.
354. Avise, John C. (1993). "Perspective: The Evolutionary Biology of Aging, Sexual Reproduction, and DNA Repair". Evolution. 47 (5): 1293–1301. Bibcode:1993Evolu..47.1293A. doi:10.1111/j.1558-5646.1993.tb02155.x. PMID 28564887.
355. Bengston, Vem L. (Ed.); Gans, Daphna; Putney, Norella; Silverstein, Merril. Handbook of Theories on Aging 2nd Edition. Springer Publishing Company. 2008: 25-33. ISBN 978-0-826-16251-9.
356. Avise, John C. (1993). Perspective: The Evolutionary Biology of Aging, Sexual Reproduction, and DNA Repair. Evolution. 47 (5): 1293—1301. Bibcode:1993Evolu..47.1293A. doi:10.1111/j.1558-5646.1993.tb02155.x. PMID 28564887.
357. Fields, S; Johnston, M. "Cell biology. Whither model organism research?". Science. 307 (5717). mart 2005: 1885–86. doi:10.1126/science.1108872. PMID 15790833.