In roots, the Protoxylem lies toward __________ and Metaxylem lies toward the _______ respectively.
1. | Periphery, centre | 2. | Centre, periphery |
3. | Above, below | 4. | Below, above |
Phloem in angiosperm is composed of
a. | Sieve tube element |
b. | Companion cell |
c. | Phloem parenchyma |
d. | Phloem fibres |
e. | Tracheids |
f. | Vessels |
1. a,b,c,d
2. b,c,d,e
3. c,d,e,f
4. None
Phloem of gymnosperm consist of
1. | Albuminous cells and Sieve cells |
2. | Sieve tubes and companion cells |
3. | Phloem parenchyma and phloem fibres |
4. | None of the above |
Function of sieve tubes are controlled by
1. | Nucleus of sieve tube |
2. | Nucleus of companion cell |
3. | Nucleus of parenchyma |
4. | No function as they are dead cells |
Resin, latex and mucilage are found in
1. | Phloem parenchyma | 2. | Xylem parenchyma |
3. | Phloem pits | 4. | None of the above |
Phloem parenchyma is absent in most of the
1. Dicotyledons
2. Monocotyledon
3. Desert plants
4. None of the above
Phloem fibres are made up of
1. | Parenchymatous cells |
2. | Sclerenchymatous cells |
3. | Collenchymatous cells |
4. | None of the above |
Epidermis in plant is generally
1. | Single layered |
2. | Double layered |
3. | Triple layered |
4. | Present in patches |
Epidermal cells are parenchymatous with __________ amount of cytoplasm lining, the cell wall and _______ vacuole.
1. | Small, large | 2. | Large, small |
3. | Small, no | 4. | Large, no |
A waxy thick layer which prevent water loss is
1. Cuticle
2. Guard cell
3. Epidermis
4. Stomata