Ammonia
A) is soluble in water.
B) can be stored in the body as a precipitate.
C) has low toxicity relative to urea.
D) is metabolically more expensive to synthesize than urea.
E) is the major nitrogenous waste excreted by insects.

Question

Quizplus · Accepted Answer

Ammonia is highly soluble in water and forms ammonium ions in an aqueous solution. It is toxic to organisms, which is why it is converted to less toxic forms like urea or uric acid before excretion. Ammonia is not stored in the body, nor is it the major nitrogenous waste product excreted by insects. Urea is actually metabolically more expensive to synthesize than ammonia.