Answer
Different species may be challenged by different forms of reproductive isolation. In the case of allopatric speciation, a body of water may prevent two populations of land-dwelling animals from mating, but a mountain range can separate two populations of birds. If the two geographic barriers were switched, neither would prevent the animals from mating with the other population.
Work Step by Step
Different species may be challenged by different forms of reproductive isolation. In the case of allopatric speciation, a body of water may prevent two populations of land-dwelling animals from mating, but a mountain range can separate two populations of birds. If the two geographic barriers were switched, neither would prevent the animals from mating with the other population.