Question

Excretion process involves

• A. removal of nitrogenous waste
• B. removal of byproducts of anabolism and catabolism
• C. removal of bile pigments
• D. All of the above

Answer 1

The correct option is D

All of the above

Explanation of the correct option:

The correct option is D:

1. The process by which the waste products that are harmful to the body are removed from the body is known as excretion.
2. The excretory products are mainly nitrogenous wastes.
3. The nitrogenous wastes are mostly the waste products from metabolic reactions - anabolism and catabolism.
4. The bile pigments are also excreted in the form of wastes.
5. Thus it includes all of the above.

Explanation of the incorrect options:

Option A:

1. The excretory products are mostly nitrogenous compounds.
2. But it includes other two options - metabolic wastes and bile pigments.

Option B:

1. The metabolic (anabolic and catabolic) wastes are released out of the body via excretion.
2. But they are of the form of nitrogen and the waste products also include pile pigments.

Option C:

1. The bile pigments are released via excretion.
2. But the main waste products are the nitrogenous wastes products from the metabolism.

The excretion process involves the removal of nitrogenous waste, the removal of byproducts of anabolism and catabolism, and the removal of bile pigments.