Question

A root hair is formed by
A) Epidermal cell
B) Endodermal cell
C) Cortical cell
D) None of the above

Answer 1

The root hairs are cylindrical extension of root. Root hairs are important for the acquisition of nutrients, microbes interactions, and plant anchorage. Root hairs in Arabidopsis have attached a great deal of attention from plant biologists because they provide numerous advantages for studies and development.

Step by step answer: The root hairs are very important for plants because they are mineral carriers.
Option A: Epidermal cell: Root hairs are a tabular extension of the epidermis that greatly increase the surface area of the root. They are found only in the region of the Maturation of the root. The function of root hairs is to collect water and mineral nutrients present in the soil and take this solution up through the roots to the rest of the plants.
Option B: Endodermal cell: The endodermis is the central, innermost layer of the cortex. In some land plants, it is also made of compact living cells surrounded by an outer ring of endodermal cells that are impregnated with hydrophobic substances to restrict the apoplastic flow of water inside.
Option C: Cortical Cell: cortical cells are unspecialized cells that lie between the epidermis and vascular or conducting tissues of stems and roots. In plants, cortical cells may contain stored carbohydrates or other substances like resins and all.
Thus, the answer is option A: Epidermal cell

Note: Epidermis is the outermost layer of the cell covering the plant body. A waxy layer is called a cuticle which covers the epidermal surface and provides a cell of root bear root hair that increases the surface area for water absorption.