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. | Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells |
4. | Contraction of outer wall of guard cells |
Opening and closing of stomata are due to the:
1. Hormonal change in guard cells
2. Change in Turgor pressure of guard cells
3. Gaseous exchange
4. Respiration