The main function of the plant tissue shown below is:
1. Storage of nutrients
2. Providing buoyancy to submerged plants
3. Mechanical support to growing parts of a plant
4. Increase in the length of the plant
Consider the following statements:
In a monocot stem-
I: | Hypodermis is collenchymatous. |
II: | Vascular bundle are collateral and closed. |
III: | Trichomes are usually absent. |
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
Consider the following statements about dicot leaf:
I: | The epidermis which covers both the upper surface (adaxial epidermis) and lower surface (abaxial epidermis) of the leaf has a conspicuous cuticle. |
II: | More stomata present on upper surface. |
III: | Mesophyll is differentiated into palisade and spongy parenchyma. |
Which of the above statements are true?
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II and III |
Consider the following statements:
With respect to secondary growth in dicot root-
I: | The vascular cambium is completely secondary in origin. |
II: | The primary phloem bundles are gradually crushed and not seen in older roots. |
III: | Phellogen gives rise to secondary tissue on the outside and forms the phellem. |
Which of the above statements are true?
1. I and II only
2. I and III only
3. II and III only
4. I, II and III
Companion cells are closely associated with
(1) sieve elements
(2) vessel elements
(3) trichomes
(4) guard cells
The desert grasses, often curls their leaf to minimise water loss due to presence of
1. Spines
2. Palisade parenchyma
3. Bundle sheath cells
4. Bulliform cells
Match the Column I and II.
Column I |
Column II |
A. Bulliform cells |
1. Stomata |
B. Guard cells |
2. Aerating pore |
C. Lenticels |
3. Accessory cells |
D. Subsidiary cell |
4. Isobilateral cells |
A B C D
(a) 1 2 3 4
(b) 3 1 2 4
(c) 4 1 2 3
(d) 4 3 2 1
The vascular bundle shown in the diagram is most likely to be seen in:
1. Monocot stem
2. Dicot stem
3. Monocot root
4. Dicot root
Which one of the following comprises only simple tissue?
1. Parenchyma, Collenchyma and Sclerenchyma
2. Parenchyma, Xylem and Collenchyma
3. Parenchyma, Xylem and Sclerenchyma
4. Parenchyma, Xylem and Phloem
Match the following
A. | Meristem | i. | Photosynthesis, storage |
B. | Parenchyma | ii. | mechanical support |
C. | Collenchyma | iii. | Actively dividing cells |
D. | Sclerenchyma | iv. | stomata |
E. | Epidermal tissue | v. | Sclereids |
A. A-i, B-iii, C-v, D-ii, E-iv
B. A-iii, B-i, C-ii, D-v, E-iv
C. A-ii, B-iv, C-v, D-i, E-iii
D. A-v, B-iv, C-iii, D-ii, E-i