Epidermis
Epidermis
Epidermis
Epidermis is the outermost protective layer. If you study the section of a leaf, many pores will be observed in the epidermis. These pores are stomata. Due to a protective role, the epidermis forms a continuous layer. Inter-cellular spaces are absent. Stomata helps in the diffusion of gases in leaves.
Transpiration, i.e., loss of water vapour from leaves, also takes place through stomata. These pores are surrounded by two kidney-shaped guard cells which regulate the opening and closing of stomata.
The cells of epidermis are same as that of the other cells but get modified on the outermost boundaries of the plant parts and form protective tissues that protect inner tissues. This outermost layer is initially one cell in thickness and is covered with cutin.
Cuticle: It is a protective, waxy and hard layer present outside the epidermis. It is consist of a complex compound called as cutin.
Which of the following are correct ? (a) The epidermis has many pores called stomata. (b) During transpiration loss of water vapour from leaves takes place through stomata. (c) Cuticle is a protective, waxy and hard layer present outside the epidermis. | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct ?] (a) The epidermis is the outermost protective layer . (b) Cuticle is a complex, waterproof chemical substance. (c) Cork cells are dead and are arranged compactly in radial rows without inter-cellular spaces. | |||
| Right Option : C | |||
| View Explanation | |||
In plants ______________ is a complex, waterproof chemical substance. | |||
| Right Option : B | |||
| View Explanation | |||
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