Xylem:Structure and Function
Xylem:Structure and Function: Overview
This topic covers concepts, such as Secondary Xylem, Primary Xylem, Xylem, Tracheids, Vessels, Xylem Parenchyma, Xylem Fibres, Protoxylem, Metaxylem, Exarch, Mesarch, Centrarch, and Endarch.
Important Questions on Xylem:Structure and Function
Metaxylem is the part of _____ (primary/secondary) xylem in the plant.
Which of the following is responsible for the conduction of water in the body of a plant?
Metaxylem helps in the conduction of _____ (water/gases) in the body of a plant.
Metaxylem has no role in the conduction of water in the plant's body.
Which of the following substance is mainly transported by the xylem?
Match the following ?
| Column I | Column II | ||
| (a) | Protoxylem | (i) | Narrow sieve tubes |
| (b) | Metaxylem | (ii) | Larger sieve tubes |
| (c) | Protophloem | (iii) | First formed xylem |
| (d) | Metaphloem | (iv) | Xylem towards periphery |
| (v) | Later formed xylem |
Match the following and choose the correct option.
| a |  |
i | Sclereid |
| b |  |
ii | Tracheid |
| c |  |
iii | Fibre |
| d |  |
iv | Vessel |
| v | Collenchyma |
One of the following statements is not true with reference to the complex tissue xylem:
Vascular tissue having abundant vessels and fibers is
The cambium ring becomes active and begins to cut off new cells, both towards the inner and the outer sides. The cells cut off towards pith, mature into .......(i)..... and the cells cut off towards periphery mature into ...............(ii) ............ In this question (i) & (ii) are respectively -
Formation of secondary xylem and phloem is respectively
Amount of secondary xylem as compared to secondary phloem formed every year is
The annular and spirally thickened conducting elements generally develop in the protoxylem when the root or stem is
Which of the following is an example of lightweight commercial wood?
In ascending part of the plant axis in flowering plants, the xylem is
A piece of wood having no vessels must belong to
