NEET2026BiologyChapterActual
Which of the following statements correctly describes the bulliform cells found in isobilateral leaves?
Options
- AThey are modified abaxial epidermal cells containing abundant chloroplasts.
- BWhen they become turgid, they cause the leaf to curl inwards to prevent water loss.
- CThey are large, empty, colourless cells present on the adaxial epidermis along the veins.
- DThey are specialized bundle sheath cells that regulate the transport of water and minerals.
Correct answer
C. They are large, empty, colourless cells present on the adaxial epidermis along the veins.
Step-by-step solution
In grasses (isobilateral leaves), certain adaxial epidermal cells along the veins modify themselves into large, empty, colourless cells known as bulliform cells. When the bulliform cells in the leaves have absorbed water and are turgid, the leaf surface is exposed. When they are flaccid due to water stress, they make the leaves curl inwards to minimise water loss. Therefore, they are large, empty, colourless cells present on the adaxial epidermis along the veins. Answer: They are large, empty, colourless cells pres