AP BIOLOGY

Detailed explanation-1: -Root hairs are tubular extensions of the epidermis that greatly increase the surface area of the root.

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: -Because they vastly increase the root surface area and effectively increase the root diameter, root hairs are generally thought to aid plants in nutrient acquisition, anchorage, and microbe interactions (Cutter, 1978; Hofer, 1991).

Detailed explanation-4: -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.