Question

Which of the following animals secretes its nitrogenous waste entirely as ammonia?

Select one:

a. cougar

b. bird

c. grasshopper

d. fish

Answer 1

Answere : The correct option is option (d) i.e. "fish".

Explanation : Fishes are aquatic animals that secretes its nitrogenous waste entirely as ammonia.

Animals that secrete ammonia as main excretory product are known as ammonotelic. Aquatic animals such as crustaceans, bony fishes and amphibian larvae generally are ammonotelic because ammonia diffuses more easily through membranes and it is more water-soluble than the other nitrogen wastes.

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