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Evolutionary biology is a sub-field of biology concerned with the origin and descent of species, as well as their change, multiplication, and diversity over time. Biologically, evolution is the change in the inherited traits of a population from generation to generation. These traits are the expression of genes that are copied and passed on to offspring during reproduction. Mutations in these genes can produce new or altered traits, resulting in heritable differences (genetic variation) between organisms. New traits can also come from transfer of genes between populations, as in migration, or between species, in horizontal gene transfer. Evolution occurs when these heritable differences become more common or rare in a population, either non-randomly through natural selection or randomly through genetic drift.
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The hominoids are descendants of a common ancestor.
Evolutionary biologists • Eugenics • Evolutionary biology literature • Evolutionary dynamics • Evolutionary game theory • Extinction • History of evolutionary biology • Human evolution • Microbial population biology • Molecular evolution • Mutation • Paleontology Phylogenetics • Population genetics • Evolutionary psychology • Selection • Sociobiology • Speciation • Symbiosis • Tree of life •
- ...that adaptations enable living organisms to cope with environmental stresses and pressures?
- ...that maintained gene flow between two populations can also lead to a combination of the two gene pools, reducing the genetic variation between the two groups?
- ...that all forms of natural speciation have taken place over the course of evolution, though it still remains a subject of debate as to the relative importance of each mechanism in driving biodiversity?
- ...that despite the relative rarity of suitable conditions for fossilization, approximately 250,000 fossil species are known?
- ...that genetic sequence evidence thus allows inference and quantification of genetic relatedness between humans and other apes?
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WikiProjects connected with biology:
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- Molecular and Cellular Biology
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A complete list of scientific WikiProjects can be found here. See also Wikispecies, a Wikimedia project dedicated to classification of biological species.
Evolutionary biology fields— Cladistics • Ecological genetics • Evolutionary development • Human evolution • Molecular evolution • Phylogenetics • Population genetics
Mechanisms— Natural selection • Genetic drift • Gene flow
Outcomes— Adaptation • Co-evolution • Co-operation • Speciation • Extinction
Research and history— Evidence of common descent • Evolutionary history of life • History of evolutionary thought • Modern evolutionary synthesis • Social effect of evolutionary theory • Objections to evolution
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Topics in biology
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| Biotechnology | Ecology | Extinction | Marine Life | Molecular and Cell Biology |
Wikipedia content modification information:
- This page was last modified on 3 August 2008, at 10:22.
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