Question

In cockroaches, the excretory product is.

• A. Ammonia
• B. Uric acid
• C. Urea
• D. Both A and C

Answer 1

The correct option is B

Uric acid

The correct option is B.

Explanation of the correct option:

Option B:

1. The excretory system in cockroaches is comprised of Malpighian tubules.
2. Cockroaches release their waster in the form of uric acid.
3. They have glandular and ciliated cells that absorb nitrogenous waste products.
4. These waste products are converted into uric acid inside the hindgut of the cockroach.
5. Organisms that release their waste product in the form of uric acid are known as uricotelic organisms.

Explanation of the incorrect options:

Option A:

1. Ammonotelic organisms release their waste product in the form of ammonia.
2. Ammonia is a toxic base that is a waste product and hence excreted out from the system.
3. Cockroaches do not release their waste product in the form of ammonia.
4. Eg, protozoans, crustaceans, platyhelminths, cnidarians, etc.

Option C:

1. Organisms that release their waste as urea are known as ureotelic.
2. Mammals, fishes, etc., metabolize their waste as urea.
3. This is an incorrect option as cockroaches do not produce urea as a waste.

Option D:

1. This is an incorrect option.

Final answer: In cockroaches, the excretory product is uric acid.