HORTICULTURE SCIENCE
PLANT BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What are the little openings on the underside of the leaf where gas exchanges occur? *
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Petiole
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Guard Cells
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Stomata
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Sepals
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Explanation:
Detailed explanation-1: -The exchange of oxygen and carbon dioxide in the leaf (as well as the loss of water vapor in transpiration) occurs through pores called stomata (singular = stoma). Normally stomata open when the light strikes the leaf in the morning and close during the night.
Detailed explanation-2: -Stomata play a critical role in gas exchange as they allow carbon dioxide to enter the plant and oxygen to be released. The opening and closing of stomata are regulated by the plant to maintain a balance between the uptake of carbon dioxide and the release of oxygen.
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