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