prevent mating or fertilization between different species
reproductive barrier that operates should interspecies mating occur and form hybrid zygotes
prezygotic barrier; when different species reproduce at different times
prezygotic barrier; the species remain isolated because they breed in different habitats.
prezygotic barrier; the species have differences in mating rituals
prezygotic barrier; the species are physically unable to reproduce
postzygotic barrier; the offspring (called a hybrid) does not survive
postzygotic barrier; the hybrid is infertile
postzygotic barrier; the first-generation hybrids are viable and fertile, but when they mate the offspring are feeble and sterile
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