73. The advantage of excreting wastes as urea rather than as ammonia is that
(A) urea can be exchanged for Na+
(B) urea is less toxic than ammonia
(C) urea requires more water for excretion than ammonia
(D) urea does not affect the osmolar gradient

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統計： A(0), B(12), C(0), D(0), E(0) #2765636

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#5737883
B
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私人筆記#5746000
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