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Xylem

The annular a...

Question

The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is

A

Differentiating

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B

Maturing

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C

Elongating

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D

Widening

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Solution

The correct option is B
Maturing

After the growth of the conducting elements in xylem has stopped, secondary wall materials are deposited on these cells. These thickenings are in the form of various shapes such as annular and spiral. This happens when the xylem components are maturing.

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(d) Companion cell is devoid of nucleus at maturity
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II. In exarch condition, the protoxylem is towards the periphery
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Which of the following meristematic tissue brings elongation in stem and roots?

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