Define
(a) Epidermis
(b) Cutin
(c) Stomata
Define
(a) Epidermis
(b) Cutin
(c) Stomata
(a) The outermost layer of cells that covers the whole plant is called epidermis. The epidermis is usually made of a single layer of cells. In some plants living in very dry habitats, the epidermis may be thicker since protection against water loss is critical. It protects all the parts of the plant.
(b) Epidermal cells on the aerial parts of the plant often secrete a waxy, water resistant layer on their outer surface called cutin. This aids in protection against loss of water, mechanical injury and invasion by parasitic fungi.
(c) The small pores present in the epidermis of the leaf are called stomata. Stomata are enclosed by two kidney-shaped cells called guard cells. They are necessary for exchanging gases with the atmosphere. Transpiration (loss of water in the form of water vapor) also takes place through stomata.
(a) The outermost layer of cells that covers the whole plant is called epidermis. The epidermis is usually made of a single layer of cells. In some plants living in very dry habitats, the epidermis may be thicker since protection against water loss is critical. It protects all the parts of the plant.
(b) Epidermal cells on the aerial parts of the plant often secrete a waxy, water resistant layer on their outer surface called cutin. This aids in protection against loss of water, mechanical injury and invasion by parasitic fungi.
(c) The small pores present in the epidermis of the leaf are called stomata. Stomata are enclosed by two kidney-shaped cells called guard cells. They are necessary for exchanging gases with the atmosphere. Transpiration (loss of water in the form of water vapor) also takes place through stomata.
