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  3. Assertion: Smaller the organism higher is the rate of metabolism per gram weight.

. Assertion: Smaller the organism higher is the rate of metabolism per gram weight.

Reason: The heart rate of a six month old baby is much higher than that of an old person.

Best Answer

Ans || (a)

Solution ||| In smaller organisms, the rate of metabolism is higher in comparison to adult one. For example the average heart rate per minute in new born baby is 130, while in 75 years and above aged persons it is only 75. Hence, both assertion and reason are true and reason is the correct explanation of assertion.

 

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