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Question
Aquatic animals like fish excrete their wastes in gaseous form as
Options
Oxygen
Hydrogen
Ammonia
Nitrogen
Solution
Ammonia
Explanation:
Most aquatic animals, e.g., bony fish, Hydra, leech, crocodile etc. excrete the waste as ammonia gas, which easily dissolves in water. These animals are referred to as ammonotelic animals and excretion of ammonia is termed ammonotelism.
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