Evolution and Natural Selection Review

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Extinction

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The process in which an animal cannot reproduce any more and dies out.

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Evolution

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The theory that organisms have changed gradually over a long period of time to form new organisms.

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Father of Evolution

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Charles Darwin, known for his contributions to the understanding of evolution and natural selection.

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Natural Selection

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The idea that organisms better suited for their environment will survive and reproduce.

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Genetic Drift

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A mechanism of evolution that refers to random changes in the frequency of alleles in a population.

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Speciation

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The process by which new species arise from existing species.

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Adaptation

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Any physical or behavioral characteristic that helps an organism to better survive in its environment.

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Gene Flow

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The transfer of genetic variation from one population to another.

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Fossil Record

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The history of life as documented by fossils, providing evidence for evolution.

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Common Descent

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The principle that all living organisms share a common ancestor.