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Ans: (d) maturation.
Sol: Root hair are lateral tubular outgrowths that develop from the outer cells of zone of maturation or root hair zone.
Explanation: Root hairs develop from zone of maturation.
Identify the wrong statement in context of heartwood. (a) It is highly durable. (b) It conducts water and minerals efficiently. (c) It comprises dead elements with highly lignified walls. (d) Organic compounds are deposited in it.