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What considerations determine if an animal excretes nitrogenous waste as ammonia, uric acid, or urea

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A major factor in determining the mode of nitrogen excretion is the availability of water in the environment. Generally, aquatic animals excrete mostly ammonia, whereas terrestrial animals excrete either urea or uric acid.
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User Mcnk
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Answer:

A major factor in determining the mode of nitrogen excretion is the availability of water in the environment. Generally, aquatic animals excrete mostly ammonia, whereas terrestrial animals excrete either urea or uric acid.

Step-by-step explanation:

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User Mare Infinitus
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