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

Opening and closing of stomata is a function of

Transpirational rate is controlled by

The stomatal aperture, guard cell and the surrounding subsidiary cells are together called________.