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| generally, in biology, the process of change by which new species develop from preexisting species over time; at the genetic level, the process in which inherited characteristics within populations change over time; the process defined by Darwin as “descent with modification” |
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| the human practice of breeding animals or plants that have certain desired traits |
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| the process by which individuals that are better adapted to their environment survive and reproduce more successfully than less well adapted individuals do; a theory to explain the mechanism of evolution |
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| the process of becoming adapted to an environment; an anatomical, physiological, or behavioral change that improves a population's ability to survive |
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| the trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock |
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| describes a character that is shared by a group of species because it is inherited from a common ancestor |
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| the formation of new species as a result of evolution |
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| the study of the frequency and interaction of alleles and genes in populations |
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| a distribution of numerical data whose graph forms a bell-shaped curve that is symmetrical about the mean |
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| a state in which the allele frequencies of a population remain in the same ratios from one generation to the next |
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| a state in which a particular set of populations can no longer interbreed to produce future generations of offspring |
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| a taxonomic classification below species that groups organisms that live in different geographical areas, differ morphologically from other populations of the species, but can interbreed with other populations of the species |
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