In which species would sexual dimorphism in body size be most extreme? (Note: The makeup of a typical social group is provided after the species name.)

Question

Quizplus · Accepted Answer

In species 4, where there is one male with 20 females in a social group, sexual dimorphism in body size would likely be most extreme. As the number of females increases in relation to the male, there is often increased competition among males for access to females, leading to selection for larger body size in males. Thus, the male in species 4 would likely be much larger than the females.

In Which Species Would Sexual Dimorphism in Body Size Be