38. Animal Form and Function

True or False: The increase in red blood cell count in tourists visiting Tibet is an example of acclimatization.

What are three attributes of mitochondria and chloroplasts that suggest they were once free-living bacteria?

Which of these examples best describes the concept that form facilitates function?

a. Crickets must balance their resources between spermatophore production and immune defenses.

b. A desert jackrabbit has large ears that help eliminate excess heat.

c. An Antarctic fish maintains homeostasis by conforming to the stable, external temperature.

d. Honeybees will swarm around a predatory wasp and contract their flight muscles to generate a lethal ball of heat.

Consider the energy budgets for a human, an elephant, a penguin, a mouse, and a snake. The would have the highest total annual energy expenditure, and the would have the highest energy expenditure per unit mass.

a. Elephant; mouse

b. Elephant; human

c. Mouse; snake

d. Penguin; mouse