

The diagram below shows the cross-section of a leaf.
(a) What is the function of a stoma?
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(b) Which part of the leaf are stomata usually found?
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(c) Explain why they are found at the part of the leaves stated in (b).
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(a) It takes in carbon dioxide and gives out oxygen.
(b) The underside of the leaf.
(c) They are sheltered from direct sunlight, thus preventing water loss.