Read the following statements and mark them as true (T) or false (F).
(a) Intrafascicular cambium develops in between secondary xylem and secondary phloem during the secondary growth of plant organ.
(b) Interfascicular cambium develops from cells of medullary rays
(c) The vascular cambium is generally more active on the inner side.
(d) The vascular cambium ring cuts off the secondary xylem away from the center.
Important Questions on Anatomy of Flowering Plants
(i) Secondary cortex
(ii) Wood
(iii) Secondary phloem
(iv) Phellem
The anatomy of spring wood shows some peculiar features. Identify the correct set of statements about spring wood.
(a) It is also called the early wood.
(b) In spring, cambium produces xylem elements with narrow vessels.
(c) It is lighter.
(d) The spring wood along with autumn wood shows alternate concentric rings forming annual rings.
(e) It has a lower density.
Choose 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 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.
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.
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:
Reason (R): The secondary xylem is produced more than the secondary phloem.
The correct option among the following 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
