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ch 24

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speciation
An evolutionary process in which one species splits into two or more species
prezygotic reproductive barriers
A reproductive barrier that impedes mating between species or hinders fertilization if interspecific mating is attempted
postzygotic reproductive barriers
A reproductive barrier that prevent hybrid zygotes produced by two different species from developing into viable, fertile adults
allopatric speciation
The formation of new species in populations that are geographically isolated from one another.
sympatric speciation
The formation of new species in populations that live in the same geographic area