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(C) In grasses,certain adaxial epidermal cells along the veins modify themselves into large,empty,colourless cells called bulliform cells or motor cel

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possess specialized motor cells

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(C) In grasses,certain adaxial epidermal cells along the veins modify themselves into large,empty,colourless cells called bulliform cells or motor cells. When these cells in the leaves have absorbed water and are turgid,they make the leaf surface exposed. When they are flaccid due to water stress,they make the leaves curl inwards to minimize water loss.

Many types of grass leaves have the ability to roll or unroll because they .....

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