SSC
BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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help control the temperature of the plant
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control how much water enters the leaf
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control how much glucose is stored
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control the movement of water vapour & gases
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Detailed explanation-1: -They help to regulate the rate of transpiration by opening and closing the stomata. Light is the main trigger for the opening or closing. Each guard cell has a relatively thick cuticle on the pore-side and a thin one opposite it.
Detailed explanation-2: -Guard cells use osmotic pressure to open and close stomata, allowing plants to regulate the amount of water and solutes within them.
Detailed explanation-3: -Guard cells regulate the opening and closing of stomatal holes, which are controlled by the process called osmosis. The entry of water into the stomata makes guard cells swell which leads to the opening of the stomata. The stomata close when the guard cells lose water and constrict, becoming flaccid and straight.