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

The companion cells help in maintaining the ________ in the sieve tube.

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

Which component of Jute, Flax and Hemp are commonly used?
1. Phloem fibres
2. Xylem fibres
3. Sieve tubes
4. All of the above

Epidermis in plant is generally

Epidermal cells are parenchymatous with __________ amount of cytoplasm lining, the cell wall and _______ vacuole.

A waxy thick layer which prevent water loss is

Cuticle is not found in