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Meristematic Tissue

Name the foll...

Question

Name the following by choosing the correct option:
The guard cells of stomata are:

[1 Mark]

A

Irregular in shape

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B

Convex in shape

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C

Long and cylindrical in shape

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D

Kidney-shaped

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Solution

The correct option is D Kidney-shaped

Stomata are minute pores of elliptical shape, consisting of two specialised epidermal cells called guard cells. The guard cells are kidney-shaped and allow the exchange of gas and control water loss within the leaf.

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Q. Which of the following statement is correct regarding opening and closing of stomata?
(i) stomata opens when guard cells are turgid.
(ii) stomata closes when guard cells are turgid.
(iii) stomata opens when guard cells are flaccid.
(iv) stomata closes when guard cells are flaccid.

Q. Stomata are bound by a pair of guard cells. Stomata close, when the guard cells become

Q. Match the following and choose the correct option from below.

A. Secondary meristem	(i) Guard cells
B. Tracheids	(ii) Single layer
C. Stomata	(iii) Cork
D. Epidermis	(iv) Tubular dead cells

Q. Statement 1: Guard cells contain chloroplasts.
Statement 2: Stomata are surrounded by guard cells.

Q. Arrange the events of the opening of stomata in the correct sequence and choose the correct option accordingly.

I. Lowering of osmotic potential of guard cells.
II. Decline in guard cell solute.
III. Rise of potassium ion level in guard cells.
IV. Guard cells absorb water from neighboring epidermal cells.
V. Guard cells become flaccid.

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