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1. An evolutionary modification that improves an organism's chances of survival and reproductive success 2. A decline in the response of a receptor subjected to repeated or prolonged stimulation |
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| The selection by humans of traits that are desirable in plants or animals and breeding only those individuals that have the desired traits. |
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| The study of the past and present geographic distributions of organisms. |
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| The theory that continents were once joined and later split and drifted apart. |
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| The independent of evolution of structural or functional similarity in 2+ distantly related species, usually as a result of adaptations to similar environments. |
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