Q. No.Phloem parenchyma is absent in most of the
1. Dicotyledons
2. Monocotyledons
3. Desert plants
4. None of the above
1. Dicotyledons
2. Monocotyledons
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
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
Opening and closing of stomata is a function of
(1) Cuticle
(2) Guard cell
(3) Waxy layer
(4) Xylem
The stomatal aperture, guard cell and the surrounding subsidiary cells are together called________.
(1) Stomata
(2) Stomatal apparatus
(3) Stomatal aperture
(4) Cuticle
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