Question

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

• A. Urea
• B. Calcium carbonate
• C. Potassium urate
• D. Ammonia

Answer 1

The correct option is C

Potassium urate

The correct option is C

Explanation of the correct option:

1. Cockroaches are a type of domestic pests or insects that can be found in moderate climates.
2. Cockroaches' excretory organs are called Malpighian tubules.
3. It excretes potassium urate, which is deposited in the haemolymph as soluble potassium urate.
4. Urate is absorbed in the Malpighian tubes. The potassium urate is then converted to potassium hydrogen carbonate and uric acid by reacting with carbon dioxide and water.
5. Uric acid is released as potassium urate is absorbed.

Explanation of the incorrect option:

Option A:

In humans, urea is the excretory product.

Option B:

Calcium carbonate is a mineral found in minute amounts in the urine.

Option D:

Bony fish excrete ammonia as a waste product.

Final answer: The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly in the form of Potassium urate.