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change in a kind of organism over time; process by which modern organisms have descended from ancient organisms
the remains (or an impression) of a plant or animal that existed in a past geological age and that has been excavated from the soil
selection by humans for breeding of useful traits from the natural variation among different organisms
a natural process resulting in the evolution of organisms best adapted to the environment
structures that have different mature forms in different organisms but develop from the same embryonic tissues
structures that are not the same in form but are used for the same purpose ex: bird wing and fly wing
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