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| a well supported testable explanation of phenomena that have occurred in the natural world |
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| the preserved remains of ancient organisms |
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| selection by humans for breeding of useful traits from the natural variation among different organisms |
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| members of each species compete regularly to obtain food, living space, and other necessities of life |
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| the ability of an individual to survive and reproduce in its specific environment |
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| and inherited characteristic that increases an organisms chance of survival |
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| process by which individuals that are better suited to survive and reproduce most successfully do so (natural selection) |
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| descent with modification |
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| principle that each living species has descended, with changes, from other species over time |
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| principle that all living things were derived from common ancestors |
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| structures that have different mature forms but develop from the same embryonic tissues |
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| organ that serves no useful function in an organism |
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