1. The human penis is largely used for what?
(a) Male-female display.
(b) Attracting the female.
(c) A higher frequency of sexual activity.
(d) Male-male display.

2. H. erectus was not the first upright hominid but bears the appellation. Why?
(a) Because it was the most upright of all the hominids.
(b) Because it is the easiest to identify of all hominids.
(c) Because it is the tallest of all hominids.
(d) Because it was the first upright hominid discovered.

3. Who are the chimps' closest living relatives?
(a) Humans.
(b) Apes.
(c) Baboons.
(d) Gorillas.

4. How are humans unique among primates?
(a) They perform sexual acts frequently.
(b) The are isolated and monogamous.
(c) They are both social and monogamous.
(d) They are both social and polygamous.

5. The author then considers the nearly uniquely human feature of female estrus?
(a) It is useless.
(b) It is non-existent.
(c) It is hidden.
(d) It is very visible.

Short Answer Questions

1. The author presents a greatly simplified view of the evolutionary process where numerous uncertain elements are noted but dismissed. For what does this allow?

2. In most primates, sexually receptive females exhibit what?

3. Why is human sexuality an unusually developed trait for primates?

4. Eventually A. robustus became extinct and A. africanus gave rise to who?

5. What race was heavily built and physically powerful with a very large brain case?

(see the answer key)

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