Which of the following has obliterated central lumen?

Vessels

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Companion cells

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Tracheid

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Xylem fibres.

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Solution

The correct option is D
Xylem fibres.

Xylem fibres are sclerenchymatous fibres composed of dead cells. They have highly thickened walls and obliterated central lumen.

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\begin{matrix} C o l u m n I & C o l u m n I I A . X y l e m v e s s e l s & 1. S t o r e f o o d m a t e r i a l s B . X y l e m t r a c h e i d s & 2. O b l i t e r a t e d l u m e n C . X y l e m f i b r e & 3. P e r f o r a t e d p l a t e s D . X y l e m p a r e n c h y m a & 4. C h i s e l - l i k e e n d s \end{matrix}

Which one of the following has cytoplasm but no nucleus : (a) xylem vessel
(b) sieve tube
(c) tracheid
(d) companion cell

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