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
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
Parenchymal cells have ________ walls and are made up of _____________.
(1) Thick, cellulose
(2) Thin, cellulose
(3) Thick, hemicellulose
(4) Thin, hemicellulose
Lignified cell wall is characteristic feature of
(1) Parenchyma
(2) Collenchyma
(3) Sclerenchyma
(4) None
_________ are commonly found in the fruit walls of nut.
1. | Parenchyma | 2. | Collenchyma |
3. | Sclerenchyma | 4. | Complex tissue |
Tracheids, vessels, xylem fibres and xylem parenchyma are components of
(1) Simple tissue
(2) Xylem
(3) Sclereids
(4) Pith
Dead cell without protoplasm is ___________.
(1) Sclerenchyma
(2) Tracheids
(3) Parenchyma
(4) Both A and B
In flowering plants which of the following are main water transporting element
(1) Tracheids
(2) Vessels
(3) Both A and B
(4) None of the above