Question

Leaf base is sheathing in
A. Wheat
B. Maize
C. Grass
D. All of the above

Answer 1

Hint: A typical leaf is a leaf that consists of three parts, that are, leaf base, petiole, and lamina. Leaf base is the node of the stem to which the lowermost part (base) of the leaf is attached. Lamina is the part of the leaf that is green and has veins and veinlets. It contains chlorophyll and is thus the primary site of photosynthesis.

Complete answer:
A typical leaf consists of three main parts i.e. leaf base, lamina, and petiole as shown in the diagram below.

The leaf is attached to the stem by the leaf base and it may also bear two lateral small leaf-like structures that are called stipules.
As already mentioned in the hint Leaf base is the node of the stem to which the lowermost part (base) of the leaf is attached.
In monocotyledonous members of the kingdom Plantae, what happens is that the leaf base expands into a sheath that covers the stem either partially or completely.
Whereas in the leguminous plants what happens is that the leaf base may become swollen, this swollen leaf base is called a pulvinus.
So all of the options as given in the question above belong to the monocotyledonous members of the kingdom Plantae. So all of them have a sheathing leaf base.

So the correct option among these is the last i.e. option D. All of the above.

Note: It is advised that the reader should note that the monocots have a sheathing leaf base and legumes have a swollen leaf base that is known as a pulvinus. The question can come from both these points.