Question

The cotton fibers are:
A. Fibers taken out from stem
B. Epidermal hairs of seeds
C. Epidermal hairs of fruits
D. Fibers taken out from roots

Answer 1

Hint: Cotton is the most widely used natural and cellulosic textile fibers in the world, and it is used to make clothing, home furnishings, and industrial items. Cotton fibers come from plants in the Malvales order, which is part of the Malvaceae family. The cuticle is a thin, lamellate structure that protects the cotton fiber. Cotton is one of the most important commercial plant based products.

Complete answer:
Option: A – Cotton fibers are not taken out of the stem as the stem of a cotton plant is devoid of hairs.
So, Option A is not correct.
Option: B - Cotton fibers are trichomes, or seed coat hairs, that emerge from the developing cottonseed's epidermal cells. Thus, cotton fibers are actually epidermal hairs of seeds. The seed coat hairs of the cotton plant are protective in nature.
So, Option B is correct.
Option C – The fruits of cotton plants are green colored cotton balls which do not have any hairs. So, Cotton fibers are not the epidermal hairs of fruits.
So, Option C is not correct.
Option D – Cotton fibers are not taken out from the roots of the cotton plants.
So, Option D is also not correct.

So, Option B. Epidermal hairs of seeds is the correct answer

Note:
Cotton is made up entirely of cellulose. Hydrogen bonding tends to keep the cellulose chains in cotton fibres in place. These hydrogen bonds form between neighboring molecules' hydroxyl groups, and they're most common between parallel, densely packed molecules in the crystalline regions of the fiber. Cotton cellulose differs from wooden cellulose in its degree of polymerization.