The Theory of Evolution

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The process of species changing slowly and consistently is known as...

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gradualism

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Similar bone structures between species is known as...

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homologous structures

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Strong evidence for evolution comes from...

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the fossil record

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Species change over time, or descent with modification is called...

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evolution

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Darwin theorized that natural selection is...

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the mechanism of evolution

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The study of the distribution of species and ecosystems in geographic space and through geological time is called...

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biogeography

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The process by which organisms better adapted to their environment tend to survive and produce more offspring is known as...

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natural selection

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Structures that have no apparent function and appear to be residual parts from a past ancestor are called...

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vestigial structures

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The concept that all living organisms share a common ancestor is known as...

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common descent

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The gradual change in a species over time is often illustrated by...

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evolutionary trees or phylogenetic trees