Biology Concepts

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Adaptation

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An inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment.

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Species

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A group of similar organisms that can mate with each other and produce offspring that can also reproduce.

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Variation

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Any difference between individuals of the same species.

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Mutation

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A change in the DNA or chromosome of an organism.

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Evolution

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Change over time: process by which modern organisms have descended from ancient organisms.

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Fossils

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The preserved remains or traces of an organism that lived in the past.

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Natural Selection

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The process by which organisms that are best adapted to their environment are most likely to survive and reproduce.

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Competition

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The struggle between organisms to survive as they attempt to use the same limited resources in the same place at the same time.

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Artificial Selection

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The process by which humans breed only those organisms with desired traits to produce the next generation. (Selective Breeding)

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Common Ancestor

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An ancestral organism from which two or more different species have evolved over time.