The diagram shows part of the xylem vessel.What is the substance x prevents the collapse of xylem vessel?

Lignin walls

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Companion cells

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End wall

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None of the above

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Solution

The correct option is A Lignin walls
Given diagram shows lignin deposition in xylem vessels. The very strong lignin walls of the xylem vessels stop them from collapsing under the suction pressure. Lignin lends rigidity and do not rot easily.

So, the correct answer is 'Lignin walls'.

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Similar questions

Xylem vessels are part of-

What substance/substances are transported in plants by :
(a) xylem vessels and tracheids ?
(b) sieve tubes (or phloem) ?

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