EVOLUTION
This article is about evolution in biology. For other uses, see Evolution (disambiguation).
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For a generally accessible and less technical introduction to the topic, see Introduction to evolution.
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Evolutionary biology
Diagrammatic representation of the divergence of modern taxonomic groups from their common ancestor.
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Evolution is the change in the inherited characteristics of biological populations over successive generations. Evolutionary processes give rise to diversity at every level of biological organisation, including species, individual organisms and molecules such as DNA and proteins.[1]
All life on Earth is descended from a last universal ancestor that lived approximately 3.8 billion years ago. Repeated speciation and the divergence of life can be inferred from shared sets of biochemical and morphological traits, or by shared DNA sequences.[2] These homologous traits and sequences are more similar among species that share a more recent common ancestor, and can be used to reconstruct evolutionary histories, using both existing species and the fossil record. Existing patterns of biodiversity have been shaped both by speciation and by extinction.[3]
Charles Darwin was the first to formulate a scientific argument for the theory of evolution by means of natural selection. Evolution by natural selection is a process inferred from three facts about populations: 1) more offspring are produced than can possibly survive, 2) traits vary among individuals, leading to different rates of survival and reproduction, and 3) trait differences are heritable.[4] Thus, when members of a population die they are replaced
Page semi-protected
For a generally accessible and less technical introduction to the topic, see Introduction to evolution.
Part of a series on
Evolutionary biology
Diagrammatic representation of the divergence of modern taxonomic groups from their common ancestor.
Key topics[show]
Processes and outcomes[show]
Natural history[show]
History of evolutionary theory[show]
Fields and applications[show]
Social implications[show]
Portal icon Evolutionary biology portal
Category Category Wikipedia book Book
Related topics
v t e
Evolution is the change in the inherited characteristics of biological populations over successive generations. Evolutionary processes give rise to diversity at every level of biological organisation, including species, individual organisms and molecules such as DNA and proteins.[1]
All life on Earth is descended from a last universal ancestor that lived approximately 3.8 billion years ago. Repeated speciation and the divergence of life can be inferred from shared sets of biochemical and morphological traits, or by shared DNA sequences.[2] These homologous traits and sequences are more similar among species that share a more recent common ancestor, and can be used to reconstruct evolutionary histories, using both existing species and the fossil record. Existing patterns of biodiversity have been shaped both by speciation and by extinction.[3]
Charles Darwin was the first to formulate a scientific argument for the theory of evolution by means of natural selection. Evolution by natural selection is a process inferred from three facts about populations: 1) more offspring are produced than can possibly survive, 2) traits vary among individuals, leading to different rates of survival and reproduction, and 3) trait differences are heritable.[4] Thus, when members of a population die they are replaced