Across nonhuman primate species, brain size is related to the size of the _____ each individual interacts with.
A) alpha male
B) environment
C) family
D) social group

Question

Quizplus · Accepted Answer

Studies have found that nonhuman primate species with larger social groups tend to have larger brain sizes, suggesting that the complexity of their social interactions may have driven the evolution of larger brains. Other factors, such as environmental challenges, may also play a role in brain size, but social group size has a particularly strong association.

Across Nonhuman Primate Species, Brain Size Is Related to the Size