First slide

Excretory Products and Organs

Question

An advantage of excreting nitrogenous wastes in the form of uric acid that

Moderate

A

uric acid can be excreted in almost solid form.
B

formation of uric acid requires a least amount of energy.
C

it is the first metabolic breakdown product of acids.
D

it may be excreted through the lungs.

Solution

Reptiles, birds, land snails and insects excrete nitrogenous wastes as uric acid in the form of pellet or paste with a minimum loss of water. Terrestrial adaptation necessitated the production of lesser toxic nitrogenous wastes like uric acid for conservation of water. Thus, excretion of uric acid is an advantage.

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