Question

Presence of sheathing leaf base and ligule are characteristics of
(a)Cycas leaf
(b)Fern leaf
(c)Mango leaf
(d)Grass leaf

Answer 1

Hint: They are mainly herbaceous and monocotyledon plants with ligules in collar regions that join the stems. They are usually upright, cylindrical, with alternating leaves and attached to the soil by roots.

Complete answer:
The presence of a sheathing leaf base and ligule are characteristics of Grasse leaf. They are part of the monocot plant because they have one cotyledon in their seed and they differ from the dicotyledonous plants (dicots) due to the presence of two leaves in their seed.
Structure of grass leaf: Grass leaves show a parallel leaf venation pattern however dicot plants show reticulate venation. Grasses mostly contain chlorophyll that gives plants their green color. Chlorophyll allows the process of photosynthesis to prepare the food for plants. The nutrients are essential for the growth and survival of plants. Grasses have leaves with a sheathing leaf base, a stem, a collar region that attach the leaves to the stem roots.
Grasses also possess rhizomes and the collar regions have different variations of ligules, auricles, and blades. At the base of the leaf sheath and the blade, the intercalary meristems are present that allow the leaf to elongate after removal of the blade from cutting, grazing, or damage by wind and rain. These intercalary meristems are regions that retain their ability to divide and produce new cells.
So, the correct answer is ‘Grass leaf’.

Note: At the point when temperatures become extremely high for an extended period, the turfgrass plant utilizes so much of its carbohydrate supply that remains very less for growth and the plant goes to the dormant stage.