Grass leaves can fold and unfold because they - Vidyadip

MCQ

Grass leaves can fold and unfold because they

✓
Have bulliform cells
B
Are long and thin
C
Have parallel venation
D
Are isobilateral

✓

Answer

Correct option: A.

Have bulliform cells

a
(a) Some of the cells in the leaves of grasses are comparatively very large, called bulliform or motor cells. It is hygroscopic in nature. $e.g.$, Ammophila.

They are thin-walled and contain big central vacuoles filled with water. They play an important role in the folding and unfolding of leaves.

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