Q.

The cockroach is

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a

uricotelic only

b

ureotelic and uricotelic

c

ammonotelic only

d

ureotelic only

answer is B.

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Detailed Solution

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The cockroach is uricotelic. Its principal nitrogenous waste is uric acid.
(1) Only aquatic animals are ammonotelic since excretion of ammonia requires large quantities of water.
(3) Some animals, such as marine cartilaginous fi shes and terrestrial amphibians, are ureotelic. They convert
ammonia into less toxic urea for excretion.
(4) Cockroaches do not excrete urea.

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