Xylem vessels become nonfunctional due to the development of

Secondary lignified walls

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Balloon like outgrowths

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Perforation plates

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Bordered pits

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Solution

The correct option is B Balloon like outgrowths
Tyloses are the balloon-like outgrowths develops into the lumen of xylem vessels mostly in secondary xylem but sometimes it is also observed in primary xylem. Deposition of various substance like resin, starch crystal, and other substance are found that make vessels non-functional.
So the correct option is 'Balloon-like outgrowths'.

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Similar questions

\begin{matrix} Column A & Column B (i) Tracheids & A. Living component of xylem (ii) Vessels & B. Tube-like cells with a tapering end (iii) Xylem Fibre & C. Look cylindrical structures having a tube- like appearance (iv) Xylem Parenchyma & D. Dead cell with lignified walls \end{matrix}

Balloon like expansions of xylem parenchyma into the lumen of the vessels in secondary xylem are called

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