Question

1. Hamilton’s rule states that:

a. altruism evolves only among nonkin.

b. selfish genes swamp altruistic genes.

c. altruistic behavior is favored if the cost to the actor is less than the benefit to the recipient, devalued by the degree of relatedness.

d. altruistic behavior is favored if the benefits to the actor are greater than the costs to the recipients, devalued by their degree of relatedness.

2. Even primate “friends” sometimes come into conflict. Their aggressive interactions may not have a detrimental effect on social cohesion if there is

a. kin selection.

b. altruism.

c. grooming.

d. reconciliation.

3. Which of the following is true of phenotypic matching?

a. It is context dependent.

b. It is common among apes but not monkeys.

c. It is the ability to recognize kin by a feature such as their smell.

d. It favors maternal kin over paternal kin.

4. Two unrelated male baboons work together to guard a female in estrus to keep away a more dominant male. This is an example of

a. mutualism.

b. altruism.

c. reciprocal altruism.

d. kin selection.

5. Reciprocal altruism requires

a. many interactions between kin.

b. the ability to count.

c. that there are no slackers or cheaters.

d. sufficient memory to keep track of altruistic and nonaltruistic acts.

Answer 1

1 d altruistic behavior is favored if the benefits to the actor are greater than the costs to the recipients, devalued by their degree of relatedness.

2 d reconciliation.

3 c It is the ability to recognize kin by a feature such as their smell.

4 d kin selection

5 d sufficient memory to keep track of altruistic and nonaltruistic acts.