Many closely related duck species exhibit ____, the dramatic variation in the appearance of males but not females, which is an almost certain sign of ____.
A) asexual reproduction; sexual selection
B) asexual reproduction; artificial selection
C) sexual dimorphism; sexual selection
D) sexual dimorphism; artificial selection
E) sexual uniformitarianism; sexual selection

Question

Quizplus · Accepted Answer

Sexual dimorphism refers to the differences in appearance between males and females of the same species, which is often a result of sexual selection, a form of natural selection where certain traits become more or less common depending on an individual's ability to attract mates.

Many Closely Related Duck Species Exhibit ____, the Dramatic Variation