The Main Nitrogenous Waste Excreted by Terrestrial Amphibians and Mammals

Question

The main nitrogenous waste excreted by terrestrial amphibians and mammals is
A)urea.
B)uric acid.
C)amino acid.
D)ammonia.
E)uracil.

Accepted Answer

Terrestrial amphibians and mammals primarily excrete urea as their main nitrogenous waste because it is less toxic and more water-soluble than ammonia, making it suitable for organisms that need to conserve water.