Question

Given below are assertion and reason. Point out if both are true with reason being correct explanation (A), both true but reason is not correct explanation (B), assertion is true but reason is wrong (C) and both are wrong (D).
Assertion. Smaller the organism, higher is the rate of metabolism per gm weight.
Reason. Heart rate of six month old baby is much higher than an old person

• A. A
• B. B
• C. C
• D. D.

Answer 1

The correct option is B B

BMR is higher per unit of the body mass in small animals as compared to larger ones. The reason is that the higher metabolic rate of smaller animals needs the oxygen to be delivered in a greater quantity to tissues around the body and they have greater surface areas as compared to volume ratio.

So, option B is the correct option.