NTA Abhyas NEET2020BotanyMorphology of Flowering PlantsPractice
Which of the following statements is incorrect?
Options
- AIn monocotyledons, the leaf base expands into a sheath covering the stem partially or wholly.
- BIn some grasses, the leaf base may become swollen, which is called the pulvinus.
- CThe leaf blade is the green expanded part of the leaf with veins and veinlets.
- DLeaves originate from shoot apical meristems and are arranged in an acropetal order.
Correct answer
B. In some grasses, the leaf base may become swollen, which is called the pulvinus.
Step-by-step solution
The leaf is a lateral, generally flattened structure borne on the stem. It develops at the node and bears a bud in its axil. The axillary bud later develops into a branch. Leaves originate from shoot apical meristems and are arranged in an acropetal order. In monocotyledons, the leaf base expands into a sheath covering the stem partially or wholly. In some leguminous plants, the leaf base may become swollen, which is called the pulvinus. The lamina or the leaf blade is the green expanded part of the leaf with veins