Download Review Questions for Biology 101

Review Questions for Biology 101 - Exam 3
Invasion of land
1. What are the benefits of living on land for plants? How about for animals? What are
the costs for each group?
2. How have plants solved some of the problems associated with terrestrial life?
3. How might jaws have evolved in fish? Give an examples of a living fish that has no
jaws. What are the major groups of jawed fish?
4. Were the first tetrapods more like ray-finned fish or lobe-finned fish? What evidence
supports your answer?
5. What genetic evidence suggests that fins and limbs evolved from the same
developmental machinary used to make a tail? [Hint: Think about Hox genes.]
Human evolution
1. How can one tell from fossil fragments whether a species was bipedal (an upright
walker) or not?
2. Which came first: large human brains or bipedal locomotion? How do we know?
3. This question has multiple parts.
a. How does melanin protect against UV radiation?
b. Why is UV radiation a mixed blessing? What are the negative and positive
effects of UV radiation for humans?
c. Why might natural selection favor lighter skin in human populations living
outside the tropics?
4. Describe cultural evolution. Give an example of a human behavior that has been
influenced more by cultural evolution than genetic evolution.