NEET BIOLOGY

Detailed explanation-1: -Root hairs are tiny extensions or projections from the outer surface of plant roots. The outer layer of a plant cell is called epidermis, or epidermal cells; therefore, root hairs are considered epidermal cells.

Detailed explanation-2: -Root hair, or absorbent hairs, are outgrowths of epidermal cells, specialized cells at the tip of a plant root. They are lateral extensions of a single cell and are only rarely branched. They are found in the region of maturation, of the root.

Detailed explanation-3: -Root hair cells have long projections that increase the surface area that the plant can use to absorb water and minerals.

Detailed explanation-4: -The epidermal cells of roots that produce root hairs are called trichoblasts, whereas epidermal cells without the capability of root hair formation are called as atrichoblasts.

Detailed explanation-5: -Root hairs are the extension of outer epidermal cells of the root. They contain large vacuoles having cell sap. The cell sap has a greater concentration of salts as compared to the surrounding subsoil water. Because of this property, water is drawn inside the root hair by a process of osmosis.