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| Change in a kind of organism over time; process by which modern organisms have descended from ancient organisms. |
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| Well-tested explanation that unifies a broad range of observations. |
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| Preserved remains or evidence of an ancient organism. |
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| Selection by humans for breeding of useful traits from the natural variation among different organisms. |
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Definition
| The ability to survive and reproduce in its environment. |
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| An inherited characteristic that increases an organisms chance of survival. |
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Definition
| The process by which individuals are better suited to their environment survive and reproduce most successfully; also called natural selection. |
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| The process by which individuals are better suited to their environment survive and reproduce most successfully; also called survival of the fittest. |
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| Descent with Modification |
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Definition
| The principal that each living species has descended, with changes, from other species over time. |
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| Structures that have different mature forms in different organisms but develop from the same embryonic tissue |
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Definition
| An organ that serves no useful function in an organism. |
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