Question

How do the guard cells regulate opening and closing of stomatal pores?

• A. Turgid guard cells causes opening of stomata
• B. Turgid guard cells causes closing of stomata
  
• C. Flaccid guard cells causes closing of stomata
• D. Both A and C

Answer 1

The correct option is D Both A and C

• The swelling of guard cells due to the absorption of water causes the opening of stomatal pores while shrinking of guard cells closes the pores.
• Opening and closing of stomata occur due to turgor changes in guard cells. When guard cells are turgid, stomatal pore is open while in flaccid conditions, the stomatal aperture closes.