Question

Excretion means

• A. Removal of nitrogenous substances
• B. Formation of that substance that has some role in the body
• C. Removal of such substances that have never been part of the body.
• D. All of the above

Answer 1

The correct option is A

Removal of nitrogenous substances

The correct option is A:

Explanation of correct option:

Excretion:

1. The removal of metabolic waste material from the body is called Excretion.
2. Urea, ammonia, uric acid, amino acid, alkaloid, and creatine is a metabolic nitrogenous waste product of the body.

Explanation of incorrect option:

Option(B):

1. The formation of that substance that has some role in the body can not be removed from the body because due to absence or deficiency of substances disturb the metabolic activity of the body.

Option (C):

1. The substances which have never been part of the body can not be removed because they are not participating in any metabolic activity of the body.

Final answer: Hence, excretion means Removal of nitrogenous substances.