| (i) Epidermal cell has small amount of cytoplasm and a large vacuole. |
| (ii) Waxy cuticle layer is absent in roots. |
| (iii) Root hairs are unicellular, while stem hairs/ trichomes are multicellular. |
| (iv) Trichomes may be branched or unbranched, soft or stiff and prevent transpiration. |
| (v) Guard cells are dumbbell shaped in dicots and bean-shaped in monocots (e.g., grass). |
A) Only (i)
B) Only (iv)
C) Only (iii)
D) Only (v)
Correct Answer: D
Solution :
[d] Guard cells are specialised cells in the epidermis of leaves, stems and other organs that are used to control gas exchange. The guard cells are produced in pairs with a gap between them that forms a stomatal pore. Guard cells are dumbbell shaped in monocots (e.g., grasses) and bean shaped in dicots.
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