Exams › NEET › Biology

Leaves of many grasses are capable of folding and unfolding because they

1. are very thin
2. are isobilateral
3. have specialised bulliform cells
4. have parallel vascular bundles

Correct answer: have specialised bulliform cells

Solution

Grasses fold and unfold their leaves because bulliform cells lose turgor when dry, causing the leaf to curl, and regain turgor when water is available, causing it to open. This movement is a water-balance adaptation, not mainly due to leaf thickness or venation pattern.

Related NEET Biology questions

• Flower is a modified shoot as
• Identify the type of modified root and select the correct statement regarding ¡t.
• Sweet potato is homologous to
• A modified aerial stem which performs function of photosynthesis, but the modification is actually to reduce the rate of transpiration is
• Gynobasic style can be traced in
• The plant, which bears clinging roots, is

⚔️ Practice NEET Biology free + battle 1v1 →