A root hair is __________.

• A. a multicellular extension of the root epidermis
• B. an extension of the endodermis of roots
• C. an outgrowth of the pericycle
• D. a modified root that provides support and anchorage
• E. an extension of an individual cell that absorbs water from soil

Answer: (E)

Verified step by step guidance

1. Understand the structure of a root hair: Root hairs are extensions of individual epidermal cells in the root, not multicellular structures.
2. Recognize the function of root hairs: They increase the surface area of the root, enhancing water and nutrient absorption from the soil.
3. Differentiate root hairs from other root structures: Root hairs are not extensions of the endodermis or pericycle, which are different layers within the root.
4. Clarify the role of root hairs in plant support: Root hairs are not involved in providing structural support or anchorage; their primary role is absorption.
5. Identify the correct description: Root hairs are extensions of individual epidermal cells, which absorb water and nutrients from the soil, fitting the description provided in the problem.