PLANT PHYSIOLOGY
PHOTOSYNTHESIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Allow gases to enter and exit the leaf
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Conserve water by closing during times when too much water can transpire
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Open when it rains so water can be taken in
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A and B only
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A and C only
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Detailed explanation-1: -Stomata regulate gas exchange between the plant and environment and control of water loss by changing the size of the stomatal pore.
Detailed explanation-2: -This evolutionary innovation is so central to plant identity that nearly all land plants use the same pores-called stomata-to take in carbon dioxide and release oxygen. Stomata are tiny, microscopic and critical for photosynthesis. Thousands of them dot on the surface of the plants.
Detailed explanation-3: -The main functions of stomata are: Gaseous exchange-Stomatal opening and closure help in the gaseous exchange between the plant and surrounding. It helps in transpiration and removal of excess water in the form of water vapour. Stomatal closure at night prevents water from escaping through pores.
Detailed explanation-4: -Closing and opening of stomata help in the exchange of gases between the plant its surrounding. It facilitates the entry of carbon dioxide into the plant and removal of oxygen from the plant. Carbon dioxide that enters the plant through stomata is a primary raw material for photosynthesis.