Natural Selection

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What is natural selection?

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The process of organisms changing over time. Organisms with traits better suited to their environment tend to survive and reproduce.

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Variation

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The different occurrences of the same trait among individuals of the same species (hair color, eye color, height, etc.).

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Trait

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A characteristic belonging to a population or organism.

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Gene

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Part of a chromosome that is inherited from the parent(s) and determines some of an organism’s characteristics.

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Artificial Selection

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A process in which humans choose specific traits they want and breed organisms together for those specific traits.

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Bacteria

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Microscopic, single-celled organism that can be found in diverse environments.

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E. Coli

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A bacteria that is found in the digestive track of humans and other animals that can reproduce quickly (about every 20 minutes). Some strains can cause severe food poisoning.

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Mutation

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A change in genetic material (DNA).

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Charles Darwin

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A famous biologist and naturalist who is known for his contributions to the study of evolution through the process of natural selection.

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Biologist

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A scientist who studies biology (living systems).