Natural selection for traits that keep distinct populations from reproducing with each other is called reinforcement. When is reinforcement beneficial?
A) when prezygotic isolating mechanisms are in place
B) when populations would otherwise fuse over time
C) when hybrids have lower fitness than either parent population
D) when one population could be overwhelmed by the other

Question

Quizplus · Accepted Answer

Reinforcement is beneficial when hybrids have lower fitness than either parent population because it strengthens prezygotic barriers, preventing the production of less fit hybrids and promoting reproductive isolation.

Natural Selection for Traits That Keep Distinct Populations from Reproducing