Bark formed early in the season is called A bark and towards the end of the season is called B bark.
Important Questions on Anatomy of Flowering Plants
(i) Secondary cortex
(ii) Wood
(iii) Secondary phloem
(iv) Phellem
Which of the following are the part of the Periderm?
I. Duramen
II. Phellogen
III. Phellem
IV. Phelloderm
V. Alburnum
The correct answer 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
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.
(a) secretion of secondary metabolites and their deposition in the lumen of vessels.
(b) deposition of organic compounds like tannins and resins in the central layers of stem.
(c) deposition of suberin and aromatic substances in the outer layer of stem.
(d) deposition of tannins, gum, resin and aromatic substances in the peripheral layers of stem.
(e) presence of parenchyma cells, functionally active xylem elements and essential oils.
Choose the correct answer from the options given below:
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:
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.
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.
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:
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:
