Same chapter3 marksDifficulty: Medium
Distinguish between endosmosis and exosmosis, and give one example of each.
Absorption by Roots
3 marksDifficulty: Medium
Describe the structure of a root hair and state how it is adapted for absorption.
Original Khojo Papers practice question — not from a past board paper.
Answer
A root hair is a long, fine tubular outgrowth of a single epidermal cell of the root. Its great length and narrowness give a very large surface area for absorption, its wall is thin and permeable, and its cell sap is more concentrated than the soil water, so water enters by osmosis.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Root hairs are found only in the region of maturation, just behind the growing tip.
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