Heartwood of most of the woody trees, fails to conduct sap due to the obstruction by
Important Questions on Anatomy of Plants
(i) Secondary cortex
(ii) Wood
(iii) Secondary phloem
(iv) Phellem
Assertion The peripheral region of the secondary xylem is lighter in colour and is known as the sapwood (alburnum).
Reason It is involved in the conduction of water and minerals from root to leaf.
The correct answer is:
The trees growing in temperature regions show clear demarcation between spring wood and autumn wood. This is because
*Note- The incorrect answer was marked. It has been changed.
The dendrochronology is based on
Match List - I with List - II.
| List-I | List-II | ||
| (a) | Lenticels | (i) | Phellogen |
| (b) | Cork cambium | (ii) | Suberin deposition |
| (c) | Secondary cortex | (iii) | Exchange of gases |
| (d) | Cork | (iv) | Phelloderm |
Select the correct answer from the options given below.
Which of the following are the part of the Periderm?
I. Duramen
II. Phellogen
III. Phellem
IV. Phelloderm
V. Alburnum
The correct answer is
Match the following lists
| List I | List II | List III |
| A) Lignified walled dead cells | i) Plants are less active | I) Secondary growth of root |
| B) During unfavourable seasons | ii) Pericycle above protoxylem | II) Medullary ray |
| C) Cambium farming narrow band of parenchyma | iii) Does not conduct water | III) Less number of xylem |
| D) Cambium forms below phloem | iv) Between secondary xylem and phloem | IV) Heart wood |
The correct match is:
A) Periderm consists of phellogen, phellem and phelloderm
B) Permanent tissue having many different types of cells is called complex tissue
C) In stem, endodermis stores starch grains
D) Heartwood and sapwood produced in a year have same colour and density
Label the parts of the Lenticel structure shown in the figure ?
Reason (R): The secondary xylem is produced more than the secondary phloem.
The correct option among the following is:
Assertion (): The spring wood has a greater number of Xylem vessels with wider lumens.
Reason (): During the spring season plant requires a large amount of water mineral salts.
