Stomata open during the day and close at night because : - Vidyadip

MCQ

Stomata open during the day and close at night because :

✓
Photosynthesis occurs during day time only
B
Enzymes convert starch into sugar at elevated pH in night
C
Loss of sugar increases osmotic concentration of the cell sap
D
Loss of starch in day time raises OP of subsidiary cells

✓

Answer

Correct option: A.

Photosynthesis occurs during day time only

(a) Photosynthesis occurs during day time only
Explanation:
Stomata open during the day to allow $CO _2$ to enter for photosynthesis and close at night to conserve water, as photosynthesis (which uses $CO _2$ ) does not occur without sunlight.

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