Question

The closely related morphologically similar sympatric populations, but reproductively isolated, are designated as [CPMT 2000]
A) Clines
B) Demes
C) Clones
D) Sibling species

Answer 1

The closely related morphologically similar sympatric populations, but reproductively isolated, are designated as Sibling species

Answer 2

The correct answer is sibling species.

Any two or more closely related species That are very similar or one can say morphologically similar. They are identical but are not capable of producing fertile offspring. They can be identified by genetic, behavioral, biochemical or ecological factors means. They are thought to be very recently divergent.