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Question

The body cells in Cockroach discharge their nitrogenous waste in haemolymph mainly in the form of

A
Ammonia
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B
Potassium urate
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C
Urea
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D
Calcium carbonate
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Solution

The correct option is B Potassium urate
Cockroach excretes nitrogenous waste in the form of soluble potassium urate, which is liberated into the haemolymph. It is taken up by the cells lining the Malpighian tubules which facilitate the absorption of urate. In the cells of these tubules, potassium urate reacts with water and carbon dioxide to form potassium hydrogen carbonate and uric acid. The former is absorbed back and the uric acid is excreted.
So, the correct answer is 'Potassium urate'.

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