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Question
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.
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Solution
The epidermal cells surrounding the guard cells are called subsidiary cells. Following are the differences between guard cells and epidermal cells:
| Guard Cells | Epidermal Cells |
| (i) They are kidney-shaped. | (i) They are barrel-shaped. |
| (ii) Chloroplast is present. | (ii) Chloroplast is absent. |
| (iii) Smaller in size | (iii) Bigger in size |
| (iv) Cell walls are not uniform and are thick. | (iv) Cell walls are uniform and thin. |
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