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11 Cards in this Set
- Front
- Back
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the rise of many new species in a relatively short time as a result of a single species that invades different habitats and evolves under different environmental pressures in those habitats
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Adaptive Radiation
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speciation that occurs when two populations are separated by a physical barrier that prevents gene flow between them (geographical isolation)
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Allopatric Speciation
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the death of all members of a species
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Extinction
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a morphological, physiological, behavioral, or ecological difference that prevents members of two species from interbreeding
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Isolating Mechanism
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having more than two homologous chromosomes of each type
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Polyploid
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any structure, physiological function, or developmental abnormality that prevents organisms of two different populations, once mating has occurred, from producing vigorous, fertile offspring
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Postmating Isolating Mechanism
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any structure, physiological function, or behavior that prevents organisms of two different populations from exchanging gametes
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Premating Isolating Mechanism
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the failure of organisms of one population to breed successfully with members of another; may be due to premating or postmating isolating mechanisms
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Reproductive Isolation
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the process of species formation, in which a single species splits into two or more species
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Speciation
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the basic unit of taxonomic classification, consisting of a population or series of populations of closely related and similar organisms. 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.
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Species
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speciation that occurs in populations that are not physically divided; normally due to ecological isolation or chromosomal aberrations (such as polyploidy)
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Sympatric Speciation
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