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Question

A mammal excretes nitrogen in the form of

A
Ammonium ions
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B
Amino acids
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C
Urea
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D
Uric acid
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Solution

The correct option is A Urea
Ureotelism is a type of excretion where urea is the main nitrogenous waste material. Animals showing ureotelism are called as ureotelic animals. Generally, found in land animals which can afford to excrete sufficient volume of water or to concentrate urea in considerable quantity in the urine. It is commonly found in man, whales, seals, desert mammals like kangaroo rats, camels, toads, frogs, cartilaginous fishes, aquatic and semi-aquatic reptiles like alligator, terrapins, and turtles.
So, the correct answer is option C.

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