Q. Which of the following facilitates opening of stomatal aperture ?
A) Contraction of outer wall of guard cells
B) Decrease in turgidity of guard cells
C) Radial orientation of cellulose microfibrils in the cell wall of guard cells
D) Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells
Explanation
[Solution] Radially arranged microfibrils make it easier for turgid guard cells to bow outward and open the pore. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.