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Adaptations

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Changes in physical structure, function, or behavior that allow an organism or species to survive and reproduce in a given environment

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Charles Darwin

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English naturalist. He studied the plants and animals of South American and the Pacific islands He set forth the Theory of Evolution

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Natural Selection

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A process in which individuals that have certain inherited traits tend to survive longer

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Genetic Variation

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Differences among individuals in the composition of their genes or other DNA segments

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Homologous Structure

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Structures in different species that are similar because of common ancestry

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Evolution

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Change in the inherited traits of a population of organisms that occurs over many generations

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Mutation

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A change in a gene

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Competition

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One or more species competing for limited resources in an ecosystem

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Trait

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A genetically determined characteristic found in an organism's genes or genotype

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Extinct

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A species that has died out completely