Question

A mammal excretes nitrogen in the form of-

• A. Ammonium ion
• B. Amino acid
• C. Urea
• D. Uric acid

Answer 1

The correct option is C

Urea

The correct option is (C):

Explanation of correct option:-

1. The elimination of metabolic waste material from the body is called Excretion.
2. Ureotelic animals are those that eliminate nitrogenous waste predominately in the form of urea.
3. Example - Mammals.
4. Hence, a mammal excrete nitrogen in the form of urea.

Explanation of incorrect option:

Option (A) :

1. Ammonotelic animals are those that eliminate nitrogenous waste predominately in the form of ammonia ions.
2. Example: - Amoeba, Many fishes and aquatic animals.

Option (B):

1. Aminotelic animals are those that eliminate nitrogenous waste predominately in the form of amino acids.
2. Example: - Unio.

Option (D):

1. Uricotelic animals are those that eliminate nitrogenous waste predominately in the form of uric acid.
2. Example: - Birds

Final answer: A mammal excretes nitrogen in the form of Urea.