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STD 11 - 6. Anatomy flowering plants — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 6. Anatomy flowering plants1 Mark
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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