Uricotelic mode of passing out nitrogenous wastes is found in

Insects and amphibians

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Reptiles and birds

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Birds and annelids

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Amphibians and reptiles

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Solution

The correct option is B Reptiles and birds
A uricotelic organism excretes uric acid or its salts as a result of deamination. Among the three major forms of excretion of nitrogenous waste in organisms, uric acid is the least toxic and the least soluble in water. A single molecule of uric acid can also remove four atoms of nitrogen, making it more efficient than ammonotelism and ureotelism.

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Q. Assertion :Birds drink very little water and insects never consume. Reason: They are uricotelic with negligible water requirement to eliminate nitrogenous waste.

Q. Which of the following is uricotelic-
(A) Reptiles
(B) BIRDS
(C) Insects
(D) Land snails.

In Hydra and Amoeba, ammonia is the main nitrogenous waste. Lizards, snakes, birds and insects excrete mostly uric acid but crocodiles and alligators excrete mainly ammonia though they are reptiles.
On the basis of this can we generalise that :-

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