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
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
What is the destiny of primary xylem in a dicot root showing extensive secondary growth?
1. It is retained in the centre of the axis
2 It gets crushed
3. May or may not get crushed
4. It gets surrounded by primary phloem
Match the following
A.Cuticle | i. guard cells |
B. Bulliform cells | ii. single layer |
C. Stomata | iii. waxy layer |
D. Epidermis | iv. empty colourless cell |
A. A-iii, B-iv, C-i, D-ii
B. A-i, B-ii, C-iii, D-iv
C. A-iii, B-ii, C-iv, D-i
D. A-iii, B-ii, C-i, D-iv
Anatomically fairly old root is distinguished from dicotyledonous stem by
1. Position of Protoxylem
2. Absence of secondary xylem
3. Absence of secondary phloem
4. Presence of cortex
During the formation of leaves and elongation of stem, some cells left behind from shoot apical meristem constitute _____________
1. Axillary bud
2. Lateral bud
3. Apical bud
4. Protoderm
. Permanent plant tissue having all cells similar in structure and function are called
(1) Simple tissue
(2) Complex tissue
(3) Meristematic tissue
(4) Fascicular tissue