First slide

The Tissues

Question

Consider the following statements and select the option that correctly fills in the blank.
(I) _A_ are elongated or tube-like cells with thick lignified walls and tapering ends.
(II) _B_ have highly thickened wall and obliterated lumen.
(III) The radial conduction of water takes place by the _C_
(IV) In roots primary xylem is described _D_

Moderate

A

A- Tracheid ; B-Xylem fibre ; C- Ray parenchyma ; D- Exarch.
B

A-Tracheid ; B- Xylem fibre ; C- Vessels ; D- Endarch.
C

A-Vessels ; B- Tracheids ; C- Ray parenchyma ; D- Exarch.
D

A-vessels ; B- Xylem fibre ; C-Tracheids ; D-Endarch.

Solution

Tracheids are elongated or tube like cells with thick and lignified walls and tapering ends.
Xylem fibres have highly thickened walls and obliterated central lumen.
The radial conduction of water takes place by the ray parenchymatous cells.
The roots have primary xylem with protoxylem towards periphery is called exarch xylem.

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