Quiz 2

Question 1

What are the Major Selection Pressures?

Answer 1

Food
Predators
Finding a mate
Disease (pathogens)

Question 2

What is an arms race?

Answer 2

Primates and plants evolved in an arms race, meaning they co-evolved together and developed adaptations against each other. Plants developed defense mechanisms to avoid being eaten by primates, and primates developed adaptations to overcome these defenses and eat them. (ex: bamboo lemurs and cyanide)

Question 3

Theory of the Selfish Herd (Hamilton)

Answer 3

Primates stay in large groups (despite more feeding competition) because having more individuals between them and a predator reduces their risk of being attacked

Question 4

Male Philopatry & Female Philopatry

Answer 4

Male Philopatry: males remain in their natal group, females leave the group at sexual maturity looking for unrelated males to mate with. (ex: chimps, spider monkeys)

Female Philopatry: females remain in their natal group, males leave the group at sexual maturity looking for unrelated females to mate with. (ex: baboons, macaques)