First slide

Excretory Products and Organs

Question

In fishes gills play an important role in the excretion of

Moderate

A

urea
B

uric acid
C

ammonia
D

guanine

Solution

Many bony fishes, aquatic amphibians and aquatic insects are ammonotelic in nature. Ammonia, as it is readily soluble, is generally excreted by diffusion across
body surfaces or through gill surfaces (in fish) as ammonium ions. Kidneys do not play any significant role in its removal.

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