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Nemotoda

Assertion : N...

Question

Assertion : Nematodes and tunicates show auxetic growth.
Reason : In these animals, growth occurs only by increases in size of cells and not number of cells.

A

Both Assertion and Reason are true and Reason is a correct explanation of Assertion

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B

Both Assertion and Reason are true but Reason is not a correct explanation of Assertion

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C

Assertion is true but Reason is false

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D

Both Assertion and Reason are false

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E

Assertion is false but reason is true.

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Solution

The correct option is A Both Assertion and Reason are true and Reason is a correct explanation of Assertion
In the Auxetic category of growth, the volume of the body increases due to the growth of body cells in their size without any change in the number of cells. It involves only cell growth and no cell reproduction. It is a rare type of growth and is found in a few nematodes (Ascaris), rotifers, tunicates (Herdmania) etc.
So the correct option is A.

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