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 Nucleus.

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Q. In the sketch of stomatal apparatus given alongside, the parts I, II, III and IV were labelled differently by four students. The correct labelling is shown in :

(1) (I) guard cells, (II) stoma, (III) starch granule, (IV) nucleus
(2) (I) cytoplasm, (II) nucleus, (III) stoma, (IV) chloroplast
(3) (I) guard cells, (II) starch, (III) nucleus, (IV) stoma
(4) (I) cytoplasm, (II) chloroplast, (III) stoma, (IV) nucleus

Q. A student had drawn the diagram of stomata in a hurry, as shown alongside. He could not be given full marks as he :

(1) forgot to draw nuclei in guard cells and also to label the diagram.
(2) did not draw nuclei in guard cells and other cells.
(3) should have drawn nuclei and chloroplasts in guard cells and nuclei in all epidermal cells.
(4) did not label the stoma in the correct position.

Q.
The stomatal pore is guarded by two kidney shaped guard cells. Name the epidermal cells surrounding the guard cells. How does a guard cell differ from an epidermal cell? Use a diagram to illustrate your answer.

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. A well stained leaf peel mount when observed under the high power of a microscope shows nuclei in :
(1) only epidermal cells
(2) only guard cells
(3) guard cells and epidermal cells
(4) guard cells, epidermal cells and stoma

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