Assertion : Senescence is time when age associated defects are manifested. Reason : Certain genes ma

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2.Human Reproduction

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Assertion : Senescence is the time when age associated defects are manifested.

Reason : Certain genes may be undergoing sequential switching on and off during one's life.

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If both the Assertion and Reason are incorrect.

(AIIMS-2005)

Solution

According to programmed senescence theory of ageing, ageing is a result of switching on and off of certain genes. $B$ and $T-$ lymphocytes undergo programmed cell death called apoptosis.

Standard 12

Biology

Mesoderm gives rise to all the structures except

normal

Give scientific reasons : When male excites sexually epididymis wall shrinks / contracts.

normal

In ladies, the oviducts are cutted or removed surgically to avoid the chances of fertilization. This is called

normal

Pituitary gland is derived from

normal

Meiosis can be observed in

normal

Assertion : Senescence is the time when age associated defects are manifested. Reason : Certain genes may be undergoing sequential switching on and off during one's life.

Solution

Similar Questions

Mesoderm gives rise to all the structures except

Give scientific reasons : When male excites sexually epididymis wall shrinks / contracts.

In ladies, the oviducts are cutted or removed surgically to avoid the chances of fertilization. This is called

Pituitary gland is derived from

Meiosis can be observed in

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Assertion : Senescence is the time when age associated defects are manifested.

Reason : Certain genes may be undergoing sequential switching on and off during one's life.