Question

The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly In the form of
A. Calcium carbonate
B. Ammonia
C. Potassium urate
D. Urea

Answer 1

Hint: Cockroaches are the insects belonging to the termites' group. They have more than 3500 species in the world. They also feed on dirty leftovers in the houses. They can lay eggs in the vents of our houses. They are attracted to the stinking places.

Complete answer:Cockroaches are the house pest or insects which can be found in the moderate regions. They respire by spiracles. They have their unique external valves which will transport the air directly into their trachea. They can hold their breath for up to 7 hours. The mouthparts of the cockroach can be of biting and chewing type. They have a labrum, a pair of mandibles, a pair of maxillae, and a labium. The other body function is the excretion of the waste material. They usually feed on the leftover food in the houses or stinking places. Malpighian tubules are the excretory organs in cockroaches. It excretes in the form of soluble potassium urate, which is deposited in the haemolymph. In the Malpighian tubes, the urate is absorbed. Then this potassium urate will react with carbon dioxide, water to give potassium hydrogen carbonate and uric acid. Potassium urate is absorbed and uric acid is released.
Option A: Calcium carbonate: It is present in the urinary excretion in small quantities.
Option B: Ammonia: It is converted in urea in the kidneys to be excreted out.
Option C: Potassium urate: The potassium urate is absorbed in the Malpighian tubes in haemolymph while the uric acid is released.
Option D: Urea: It is the excretory product in humans.
So, the answer is option C: Potassium urate

Note: A cockroach can live without breathing for more than 30 minutes. They are known to exist since the time of dinosaurs. They can even live without their head for quite some days. They cannot be blown away by nuclear power also.