Question

Four students A,B,C and D, make the records given below, for the parts marked X and Y in this
diagram.

Student	X	Y
(A) (B) (C) (D)	Stoma Guard cell Epidermal cell Stomata	Guard cell Stomata Stomata Epidermal cell

The correct record, out of these is that of student :

• A. A
• B. B
• C. C
• D. D

Answer 1

The correct option is A A

Stomata are small pores present in the epidermis of leaves. Stoma or pores allows the exchange of the gases in the plants which is controlled by the specialized epidermis cells. The stomatal pore is enclosed between two bean-shaped guard cells. The inner walls of guard cells are thick, while the outer walls are thin. The guard cells are surrounded by subsidiary cells. These are the specialized epidermal cells present around the guard cells. The pore, the guard cells and the subsidiary cells together constitute the stomatal apparatus.

The above figure represents its various parts. So, it is quite clear that X represents stomatal pore and Y represents guard cells.

So, the correct answer is option A.