Question

Cells which help in rolling and unrolling of leaf lamina in grasses are

• A. Complementary cells
• B. Motor cells
• C. Passage cells
• D. Companion cells

Answer 1

The correct option is B Motor cells

• The leaves of monocots have a large bubble-shaped epidermal cell called bulliform cells.
• They are also known as motor cells.
• They are present in the adaxial surface of the leaves.
• They play an important role in the unfolding of the developing leaves and in the rolling and unrolling of mature leaves in response to the alternating wet and dry conditions.
• So, the correct answer is 'Motor cells'.