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

1. Potassium urate
2. Urea
3. Calcium carbonate
4. Ammonia

Correct answer: Potassium urate

Solution

Cockroaches mainly eliminate nitrogenous waste as potassium urate, which is a less toxic, water-saving form suited to terrestrial life. Urea and ammonia require more water, and calcium carbonate is not a nitrogenous waste.

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