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Question

Guard cells regulate the opening and closing of stomata.


A

True

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B

False

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Solution

The correct option is A

True


This statement is TRUE.

Gaseous exchange takes place through small pores on the leaves that are known as stomata. Large amounts of gas enter and leave the cell for the purpose of photosynthesis. Loss of water from the leaves is prevented by keeping the stomata closed when photosynthesis is not taking place. The opening and closing of the stomata is controlled by the guard cells which surround the stomata.

The guard cells swell when water enters into them and the pore opens. Similarly the pore closes, when the guard cell shrinks.


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