You Are a Veterinarian Working for the San Diego Zoo

You are a veterinarian working for the San Diego Zoo. Today, you are performing an autopsy on a 22.7- gram frog and a 21.2- gram lizard, both of which appear to have died of a respiratory infection. Why are you not surprised to find that the lungs of the lizard have a larger internal surface area than those of the frog?

A) Lizards have a higher metabolic rate than frogs.
B) Lizards have dry, scaly skin, whereas frogs have thin, moist skin.
C) Lizards are more susceptible than frogs to atmospheric pollutants.
D) Lizards lay shelled eggs on land, whereas frogs lay jelly- like eggs in water.
E) The lizard is larger than the frog.