42. Osmoregulation and Excretion
Osmoregulation and Excretion
Multiple Choice
Multiple ChoiceMost aquatic animals excrete ammonia, whereas land animals excrete urea or uric acid. What is the most likely explanation for this difference?
A
They have different diets.
B
Land animals can get the energy needed to make urea or uric acid.
C
Land animals cannot afford the energy needed to make ammonia.
D
Fish need to get rid of ammonia, but land animals need it to live.
E
Ammonia is very toxic, and it takes a lot of water to dilute it.
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