Chapter 16 terms
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the rise of many new species in a relatively short time; may occur when a single species invades different habitats and evolves in response to different environmental conditions in those habitats.
the process by which new species arise following physical separation of parts of a population (geographical isolation).
the death of all members of a species.
a morphological, physiological, behavioral, or ecological difference that prevents members of two species from interbreeding.
having more than two sets of homologous chromosomes.
the failure of organisms of one population to breed successfully with members of another; may be due to premating or postmating isolating mechanisms.
the process of species formation, in which a single species splits into two or more species.
the basic unit of taxonomic classification, consisting of a group of populations that evolves independently. In sexually reproducing organisms, a species can be defined as a population or series of populations of organisms that interbreed freely with one another under natural conditions but that do not interbreed with members of other species.
the process by which new species arise in populations that are not physically divided; the genetic isolation required for sympatric speciation may be due to ecological isolation or chromosomal aberrations (such as polyploidy).
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