Assertion : Aquatic mammals like whales and seals are said to be ureotelic animals .
Reason : It is because of the fact that their main nitrogenous waste product is urea .

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and the reason are true and the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false

Answer

A

Explanation

(a) Ureotelism is defined as the urinary elimination of nitrogen mainly as urea. Aquatic mammals likes whales and seals are said to be ureotelic animals because their major nitrogenous waste product is urea. A s matter of fact, ammonia is the basic nitrogenous catabolite of protein but since ammonia is highly toxic to the animals, therefore, its concentration must be kept very low in the blood.