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| the selective breeding of domesticated plants and animals to promote the occurence of desirable traits |
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| the irrevocable loss of a species |
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| the study of past and present distribution of organisms |
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| similartiy in characteristics resulting from a shared ancestry |
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| a structure of marginal or no importance to an organism |
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| a group of individuals belonging to one species and living in the same geographic area |
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| a change in a nucleotide sequence of an organism's DNA |
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| genetic drift resulting from a drastic reduction in population size |
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| a change in the gene pool of a population due to chance |
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| genetic drift that occurs when a few individuals become isolated from a larger population |
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| the transfer of alleles from one population to another |
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| the contribution an individual makes to the gene pool of the next generation relative to the contribution of other individuals in the population |
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| natural selection that favors intermediate variants by acting against extreme phenotypes |
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| natural selection in which individuals at one of the phenotypic range survive and reproduce more successfully than do other individuals |
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| natural selection in which individuals on both extremes of a phenotypic range are favored over intermediate phenotypes |
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| a form of natural selection in which individuals with certain inherited characteristics are more likely than other individuals to obtain mates |
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| the evolution of a new species |
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| the branch of biology that identifies, names, and classifies species |
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| a biological feature of a species that prevents it from interbreeding with other species even when populations of the two species live together |
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