A) Increases
B) Decreases
C) Remains same
D) Both (a) and (b)
Correct Answer: A
Solution :
Stomata are the minute pore complex present on the epidermal layer of leaves. They form the connecting link between internal tissue of leaf and the surrounding atmosphere. Each stomata is surrounded by two small kidney shaped or bean shaped cells called guard cells and these are surrounded by a group of specialised epidermal cells known as accessory or subsideary cells. During day time, due to gradual withdrawl of \[C{{O}_{2}}\] in the process of photosyntheis. The pH of guard cell is increased. In night reverse of it occurs. In day Decrease in \[C{{O}_{2}}\] concentration \[\to \] Increase in pH of guard cell. In night Increase in \[C{{O}_{2}}\] concentration \[\to \] Decrease in pH of guard cell.
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