The stomatal apparatus comprises

guard cells

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stomata and guard cell

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stoma, guard cells and accessory cells

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guard cells and chloroplast

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Solution

The correct option is D stoma, guard cells and accessory cells
The stomatal apparatus refers to the complex structure required to perform the particular function of the stoma. The function of the stoma or pore is to allow the exchange of the gases in the plants and these pores are controlled by the specialised epidermal cells. The stomatal opening and closing are controlled by the parts of this apparatus which includes the guard cell surrounding the stomata and the subsidiary cells also called accessory cells surrounding the guard cells.
So, the correct answer is option C.

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Similar questions

Q. Given below is the diagram of a stomatal apparatus. In which of the following, all the four parts labelled as A, B, C and D are correctly identified?

	A	B	C	D
1.	Epidermal cell	Subsidiary cell	Stomatal aperture	Guard cell
2.	Subsidiary cell	Epidermal cell	Guard cell	Stomatal aperture
3.	Guard cell	Stomatal aperture	Subsidiary cell	Epidermal cell
4.	Epidermal cell	Guard cell	Stomatal aperture	Subsidiary cell

Q. In the sketch of the stomatal apparatus given alongside, which one of the following is missing?

(1) Cell membranes of the cells
(2) Cell walls of the cells
(3) Nuclei in the guard cells
(4) Chloroplasts in the guard cells

Q. Observe the structure of stomata from A to H during transpiration and match appropriately.
1. Stomatal pore
2. Accessory cells
3. Outer thin cell wall
4. Guard cells lose water by exosmosis and stomata close
5. Guard cells (kidney shaped)
6. The guard cells take in water by osmosis as indicated by arrows and stomata open
7. Inner thick cell wall
8. Vacuole

Q. Stomatal aperture is surrounded by guard cells and widens (opens) when guard cells are

Draw a neat diagram of the stomatal apparatus found in the epidermis of leaves and label the Stoma, Guard cells, Chloroplast, Epidermal cells, Cell wall and the Nucleus.

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