Speciation has occurred 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 defined by reproductive isolation, which occurs when organisms from different populations can no longer interbreed successfully. If organisms do not recognize each other's mating calls, it indicates reproductive isolation, a key factor in speciation.

Speciation Has Occurred When