When animals excrete nitrogenous waste, what form does it take?

Question

Quizplus · Accepted Answer

Animals can excrete nitrogenous waste in different forms depending on their physiology and environment. Aquatic animals such as fish typically excrete ammonia, which is highly toxic but can be efficiently eliminated in water. Terrestrial animals, on the other hand, need to conserve water and therefore convert ammonia into less toxic but more water-soluble forms such as urea (mammals, most amphibians, sharks, some bony fish) or uric acid (birds, reptiles, insects). Therefore, all the choices are correct as animals can excrete nitrogenous waste in the form of ammonia, urea, or uric acid depending on their adaptations.

When Animals Excrete Nitrogenous Waste, What Form Does It Take