The natural question is then what about Ring species? With populations A, B, and C.  A-B can breed, B-C can breed, but A-C can&#x27;t.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Ring_species" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Ring_species</a>