1. What happens to female mice as the population rises to unacceptable limits?
(a) Female mice ignore male mice's advances.
(b) Female mice become less fertile.
(c) Female mice destroy their young.
(d) Fewer female mice are born.

2. Why does the author use the word "apparently" to describe selfish or unselfish behavior?
(a) Because he doesn't believe the examples he is citing are necessarily true.
(b) Because he is only concerned about appearances of selfishness.
(c) Because behavior may only seem selfish or unselfish.
(d) Because he doesn't really believe in the terms selfish and unselfish.

3. What does Dawkins point out about different species' attitude toward offspring?
(a) Different species treat offspring differently.
(b) Different species all care for offspring equally, if environment is accounted for.
(c) Different species fall into two categories of caring for offspring.
(d) Different species care for offspring similarly, but there is great variety between individuals within species.

4. What is the most stable result of the specific ESS simulation Dawkins describes?
(a) A 1:1 mixture of two kinds of behavior.
(b) A 1:4 mixture of two kinds of behavior.
(c) A 3:2 mixture of two kinds of behavior.
(d) A 7:5 mixture of two kinds of behavior.

5. To what does Wynne-Edwards attribute changes to female mice as the population rises?
(a) Random variation in individuals.
(b) Natural selection of individuals.
(c) Random variation within groups.
(d) Group selection.