Xylem Fibers

Q.

Why xylem is called dead tissue?

Q. The only living part of xylem is/are the .

1. xylem parenchyma
2. tracheids
3. xylem fibres
4. vessels

Q.

_____________are the only living cells associated with xylem.

Q.

Which of the following has obliterated central lumen?

1. Vessels

2. Companion cells

3. Tracheid

4. Xylem fibres.

Q. Commercial fibres obtained from Jute plant are derived from ________.

1. Sieve fibres
2. Xylem fibres
3. Phloem fibres
4. Mesocarp fibres of coconut

Q.

Tracheae or xylem fibers are usually multinucleated or _________

1. Syncytial

2. Lateral

3. Vertical

4. Parallel