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09/02/2022 6:12 pm
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Which of the following helps in the curling of the leaf surface?
(a) Bulliform cells
(b) Xylem tissue
(c) Palisade parenchyma
(d) Bundle sheath cells
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09/02/2022 6:14 pm
Correct answer: (a) Bulliform cells
Explanation:
In grasses, adaxial epidermal cells along the veins modify themselves into large, empty, colorless cells. These are called bulliform cells.
When there is water stress leaves curl themselves inward to minimise water loss.
When the cells have absorbed water and are turgid, the leaf surface is exposed.