Read the given statements regarding changes occurring in organisms during aging. Choose the correct one.
$I$ - Heart rate decreases slightly with age.
$I I$ -The brain loses some cells (neurons and others get damaged)
$I I I$ -Enzyme aldolase becomes less permeable, rigid and insoluble

only

I

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I

and

I V

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I I

and

I V

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I

and

I I I

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Solution

The correct option is A only $I$
As you grow older, your pulse rate is about the same as before. But when you exercise, it may take longer for your pulse to increase and longer for it to slow down afterward. Your highest heart rate with exercise is also lower than it was when you were younger. Breathing rate usually does not change with age.
You naturally lose neurons as you age. Over time, this can affect different aspects of memory. Even in old age, though, the brain still produces about 700 new neurons in the hippocampus per day.
As the age advances, collagen becomes less permeable, rigid and insoluble.

So, the correct answer is 'only I'.

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Read the given statements regarding changes occurring in organisms during aging. Choose the correct one.I- Heart rate decreases slightly with age.II-The brain loses some cells (neurons and others get damaged)III-Enzyme aldolase becomes less permeable, rigid and insoluble

Read the given statements regarding changes occurring in organisms during aging. Choose the correct one.
$I$ - Heart rate decreases slightly with age.
$I I$ -The brain loses some cells (neurons and others get damaged)
$I I I$ -Enzyme aldolase becomes less permeable, rigid and insoluble