The Principal Nitrogenous Waste of Protozoans Is

Question

The principal nitrogenous waste of protozoans is
A)guanine.
B)ammonia.
C)urea.
D)uric acid.
E)urine.

Accepted Answer

Protozoans excrete ammonia as their principal nitrogenous waste. Ammonia is highly toxic and requires a large amount of water to be excreted out of the body. Protozoans, being aquatic animals, are able to excrete ammonia directly into the surrounding water without significant water loss.