Stomata

Q. In land plants, the gurad cells differ from other epidermal cells in having:

1. Mitochondria
2. Chloroplasts
3. Cytoskeleton
4. Endoplasmic reticulum

Q.

Water secreting glands are known as?

1. Tyloses

2. Hydathodes

3. Phellogen

4. Phelloderm

Q. The functions of the stomata does not include ________.

1. intake of carbon dioxide
2. removal of oxygen
3. guttation
4. loss of water vapour

Q. Which of the following facilitates opening of stomatal aperture?

1. Decrease in turgidity of guard cells
2. Radial orientation of cellulose microfibrils in the cell wall of guard cells
3. Contraction of outer wall of guard cells
4. Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells

Q. Stomata is part of the _________ tissue system.

1. ground
2. epidermal
3. vascular
4. conducting

Q. Specialised epidermal cells surrounding the guard cells are called

1. complementary cells
2. subsidiary cells
3. bulliform cells
4. lenticels

Q. Stomata in a mustard leaf are:

1. Dumb-bell shaped
2. Kidney shaped
3. Rectangular
4. Barrel-shaped

Q. The sugarcane plant has

1. dumb-bell shaped guard cells
2. tap-root system
3. reticulate venation
4. open vascular bundle

Q. The diagram below represents a cross section of a leaf. Which region serves primarily to regulate the stomatal opening?

1. A
2. B
3. C
4. D

Q. The specialised epidermal cells present in the vicinity of guard cells are called

1. bulliform cells
2. subsidiary cells
3. companion cells
4. endodermal cells