A waxy thick layer which prevent water loss is
1. Cuticle
2. Guard cell
3. Epidermis
4. Stomata
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 |
Epidermis in plant is generally
1. | Single layered |
2. | Double layered |
3. | Triple layered |
4. | Present in patches |
The companion cells help in maintaining the ________ in the sieve tube.
1. Temperature gradient
2. Cellulose gradient
3. Pressure gradient
4. Ion gradient
Phloem parenchyma is absent in most of the
1. Dicotyledons
2. Monocotyledon
3. Desert plants
4. None of the above
Cuticle is not found in
1. Stem
2. Branches
3. Leaves
4. Roots
Which component of Jute, Flax and Hemp are commonly used?
1. | Phloem fibres | 2. | Xylem fibres |
3. | Sieve tubes | 4. | All of the above |
Phloem fibres are made up of
1. | Parenchymatous cells |
2. | Sclerenchymatous cells |
3. | Collenchymatous cells |
4. | None of the above |
Resin, latex and mucilage are found in
1. | Phloem parenchyma | 2. | Xylem parenchyma |
3. | Phloem pits | 4. | None of the above |
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 |