Home
Class 12
BIOLOGY
[A]: Smaller the organism, higher is the...

[A]: Smaller the organism, higher is the rate of metabolism per gram weight.
[R]: The heart beat rate of an infant is much higher than that of an old person

A

If both assertion and reason are true reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
Both assertion and reason are true but reason is not the correct explanation of assertion
The basal metabolic rate is defined as the energy requirement of the human body at rest and reflect the caloric needs of the body. BMR can be determined by total body weight and the amount of muscle mass . BMR is inversely related with the weight or volume of an organism, i.e, smaller the organism , higher is the basal metabolic rate and vice varsa.
Heart rate of six month old baby is `110-112` beats/min. Though it is higher than normal adult person. but it is lower than the old person. At the age of 60, a man may have maximum heart rate of 160 beats/min (avg 120 beats/min) .
Promotional Banner

Similar Questions

Explore conceptually related problems

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 lower than that of an old person.

Assertion: Smaller the organism, higher is the rate of metabolism per gram weight. Reason: The heart rate of a six months old baby is much higher than that of adult.

The rate of heart beat per minute is highest in case of

Net rate of respiration is higher than that of photosynthesis. The plant will

Higher the metabolic rate of the animal, higher is its ______

Rate of transpiration higher than rate of water absorption shall cause

Assertion : Cardiac output is the volume of blood pumped out by each ventricle per minute. Reason : Ther cardiac output of an athlete will be much higher than that of an ordinary man.

Go through the following statements (i) As smaller animals have the higher metabolic rate, their heart rate is higher than that of the larger animals (ii) Systoles of artria and ventricles never overlap while their diastoles always partly overlap. (iii) Cardiac cycle time is inversely proportional to the heart rate Which of these are correct ?

The smaller an animal, the higher would be its respiratory rate.

Normal Heart rate is a two months old infant is