The sperm of species A dies when it comes in contact with the female reproductive tract of species B.This is an example of the phenomenon known as
A) sexual selection.
B) a prezygotic isolating mechanism.
C) a postzygotic isolating mechanism.
D) allopatric speciation.
E) polyploidy.

Question

Quizplus · Accepted Answer

This is an example of a prezygotic isolating mechanism, where the reproductive structures or behaviors of two species are different enough so as to prevent successful mating or fertilization. In this case, the sperm of species A cannot fertilize the eggs of species B due to physiological differences in their reproductive tracts.

The Sperm of Species a Dies When It Comes in Contact