What is sexual selection? How does inter-sexual selection differ from intrasexual selection? What general factors predict whether sexual selection will be 

stronger in males or in females?

Why are females generally considered to be the “ecological sex” and males 

the “mate-getting sex”?

How might sexual selection have favored infanticide as a mating tactic in 

male primates? How does langur infanticide differ from that of gorillas?

What features are associated with high levels of sperm competition in 

primates? What does the presence or absence of these features in humans 

suggest about the importance of sperm competition in human evolution?