Speciation has become complete when
A) two populations of organisms have been separated for a very long time.
B) a change in allele frequency has occurred.
C) organisms of one population do not recognize the mating call of another population and so mating does not occur.
D) offspring of mating from members of two different populations are able to mate with members of either population.

Question

Quizplus · Accepted Answer

Speciation is complete when two populations of the same species become so different that they can no longer interbreed and produce viable offspring. When organisms of one population do not recognize the mating call of another population and therefore do not mate, it is a sign that speciation has occurred.

Speciation Has Become Complete When