NEET2026BiologyChapterActual
Which of the following statements is incorrect regarding the internal structure of an isobilateral (monocotyledonous) leaf?
Options
- AThe mesophyll is not differentiated into palisade and spongy parenchyma.
- BCertain abaxial epidermal cells along the veins modify into large, empty, colourless bulliform cells.
- CThe size of vascular bundles is nearly similar, reflecting the parallel venation pattern.
- DStomata are present on both the adaxial and the abaxial surfaces of the epidermis.
Correct answer
B. Certain abaxial epidermal cells along the veins modify into large, empty, colourless bulliform cells.
Step-by-step solution
In an isobilateral (monocotyledonous) leaf, the stomata are present on both the adaxial and abaxial surfaces of the epidermis, and the mesophyll is not differentiated into palisade and spongy parenchyma. In grasses, certain adaxial (upper) epidermal cells along the veins modify themselves into large, empty, colourless cells known as bulliform cells. They help in minimising water loss by rolling the leaves inwards during water stress. The vascular bundles are nearly similar in size, which reflects the parallel venat