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20-03-2016
Biology

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Small openings in the epidermis of a leaf called guard cells allow water and other materials to enter and exit the leaf. true or false

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20-03-2016

True. The guard cells "open and close", forming stomata, which are the tiny openings on the leaf epidermis. When the guard cells are bery close against each other, the stoma is closed, preventing gases from being exchanged.

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