Question

Which clue indicates that speciation has occurred between two populations?

A.
A barrier, such as a river or mountain range, separates the two populations.

B.
Scientists have renamed one of the populations.

C.
Individuals in one population look different from those in the other population.

D.
The two populations can no longer interbreed.

Answer 1

The clue which indicates that speciation has occurred between two populations is definitely D.
The two populations can no longer interbreed. I picked this one because speciation is a process when two populations become distinct. Hope it will help!