Question

Cotton is obtained from
(a)Epidermal tissue system.
(b)Grand tissue system.
(c)Vascular tissue system.
(d)Meristematic tissue system.

Answer 1

Hint: This tissue system possesses root hairs and it comes directly in contact with the external environment because it constitutes the outermost covering or the outermost layer of the entire plant body.

Complete answer:
Cotton is obtained from the epidermal tissue system. This system forms the outermost layer or surface of the entire plant body. The cotton is soft, fluffy, unicellular epidermal lint hair or fibers that grow out around the seed of the cotton plant. The cotton fibers are made up of cellulose.

Additional Information: The epidermal tissue system consists of epidermal cells, stomata, and trichomes, and hairs.
Epidermal cells: the epidermal cells contain large central vacuole and nucleus. the cell is having an outermost lining of the cell wall.
Stomata: The stomata are the tiny pores present on the lower surface of the leaves that contain guard cells that are responsible for the opening and closing of the stomata. Stomata regulate the transpiration process and gaseous exchange in the plants.
Trichomes and hairs: these are the outgrowths from the epidermis layer. The presence of hairs or root hairs increases the total surface area for the absorption of minerals and water from the soil. The trichomes help in reducing the loss of water caused by the process of transpiration.
So, the correct answer is, 'epidermal tissue system'.

Note: -There are almost 1,000 Lint hairs present in a single seed of cotton.
-The 1kg of cotton contains more than 200 million lint hairs.
-the epidermal tissue system also protects the plant from various injuries.
-besides reducing the excess loss of water from the plant body trichomes also secrets many sticky substances to protect plants from Invaders attack.