Q. 96

The opening and closing of the stomatal pores depends upon :
A. oxygen

B. water in guard cells

C. temperature

D. concentration of CO2 in stomata

Answer :

A. The guard cells regulate the opening and closing of stomatal pores. They swell, when water flows into the guard cells and stomatal pores get opens. Similarly, when the guard cells lose water, they shrink, become straight and the stomatal pores get closed.

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