Biology · STRUCTURAL ORGANISATION IN ANIMALS

Why is the alimentary canal of the frog relatively short in length compared to many other vertebrates?

1. Because frogs are carnivores, leading to an evolutionary reduction in the length of the intestine.
2. Because the absence of an intestine necessitates direct transfer of food from stomach to cloaca.
3. Because frogs are herbivores requiring rapid transit of cellulose without fermentation.
4. Because digestion is entirely extracellular and restricted exclusively to the buccal cavity.