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Question

Ureotelic organisms like mammals excrete urea in their urine, that is formed in

A
spleen
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B
kidney
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C
liver
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D
gall bladder
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Solution

The correct option is D liver
(A) Spleen - Primarily acts as blood filter.
(B) Kidney - Kidneys are two bean-shaped organs in the renal system. They help the body pass waste as urine. They also help filter blood before sending it back to the heart.
(C) Liver - Mammals, many terrestrial amphibians and marine fishes mainly excrete urea and are called ureotelic animals. Ammonia produced by metabolism is converted into urea in the liver of these animals and released into the blood which is filtered and excreted out by the kidneys.
(D) Gall bladder - The bile secreted by the hepatic cells passes through the hepatic ducts and is stored and concentrated in a thin muscular sac called the gall bladder.
So the correct option is Liver.

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