Question

Which one is correct about bulliform/ motor cell?

• A. It is seen in grasses.
• B. It is large-sized, colorless, vacuolate cells on the adaxial surface of monocot leaf.
• C. Both of the above
• D. None of the above

Answer 1

The correct option is C Both of the above

Bulliform cells or the motor cells are the modified epidermal cells present on the upper surface or the adaxial surface of the monocot leaf (the grasses). They are colourless, large-sized and vacuolated cells. They regulate the rolling of leaves to prevent the loss of water. When water is adequately present, they become turgid and keep the leaf open and exposed. When there is scarcity of water, the become flaccid and roll-up the leaf to prevent the loss of water.

Hence, the correct nswer is 'Both of the above'