Question

why do human biengs not excrete amonia as the chief excretory product.??​

Answer 1

Ammonia is toxic, as mentioned by Anil, and it requires much water to remove from organism so it's produced primarily by water organisms which are not constraint by lack of water.

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Answer 2

Ammonia is toxic, and it requires much water to be removed from an organism so it's produced primarily by water organisms which are not constraint by lack of water.

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