Reproductive isolation occurs when?

Aa small number of individuals moves and starts a new population
Bsome catastrophic event greatly reduces the size of a population
Cthe gene pools of different populations have become very diversified
Dmembers of different populations can no longer mate successfully

Verified Answer :

I would say D. Members of different populations can no longer mate successfully. I hope I'm right and good luck :)

The answer is D: members of a different populations can no longer mate successfully


Or if they do reproduce their offspring will be sterile meaning their offspring won't be able to reproduce. An example would be a horse and a donkey mating. They usually produce sterile offspring.

Hopefully this helped and good luck.