Even trained biologists have difficulty telling females of Drosophila melanogaster and D. sechellia apart, and yet these species are reproductively isolated. Thus, these species are considered _______ species.
A) lineage
B) morphological
C) cryptic
D) Coyne's
E) sympatric

Question

Quizplus · Accepted Answer

Since these two species are difficult to distinguish morphologically but still reproductively isolated, they are considered cryptic species.

Even Trained Biologists Have Difficulty Telling Females of Drosophila Melanogaster