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Assertion : Typloses plug the tracheids ...

Assertion : Typloses plug the tracheids and vessels.
Reason : Tylosers are in growth of xylem cells.

A

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

B

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

C

If the assertion is true but the reason is false

D

If both the assertion and reason are false

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The correct Answer is:
C
The tracheids and vessels of the heart wood get plugged by in growth of the adjacent parenchyma cells into their cavities through the pits. These in growths are called tyloses. Ultimately, the parenchyma cells become lignified and dead.
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The tracheids and vessels of this wood get plugged by the ingrowth of the adjacent parenchyma cells

Go through the following statements (i) The cambium is generally more acitve on the inner side than on the outer. (ii) The autunn wood is darker and has a higher density than spring wood. (iii) In stem, the secondary xylem shows distinction into protoxylem and metxylem and occurs in the from of patches. (iv) The tracheids and vessels of the sapwood get plugged by the ingrowth of the adjacent parenchyma cells into thier cavities called tyloses. Which of theses are correct ?

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