[Campbell Biology P.781] Based on the text and Figure 34.23, which statement about the frog ... | Practice Question

Based on the text and Figure 34.23, which statement about the frog life cycle and amphibian adaptations is TRUE?

  • A: A tadpole is a terrestrial carnivore with lungs and external eardrums.
  • B: During metamorphosis, a frog's gills and tail are resorbed, and walking legs develop for terrestrial life.
  • C: Adult frogs lay eggs with hard shells to prevent desiccation in dry air.
  • D: Amphibians primarily rely on lungs for gas exchange, making moist skin less crucial.

Explanation

The text explicitly describes the metamorphosis process of a frog: 'During the metamorphosis that leads to the "second life," the tadpole develops legs, lungs, a pair of external eardrums, and a digestive system adapted to a carnivorous diet. At the same time, the gills disappear; the lateral line system also disappears in most species. The young frog crawls onto shore and becomes a terrestrial hunter.' This matches option B.