Same chapter3 marksDifficulty: Medium
Distinguish between endosmosis and exosmosis, and give one example of each.
Absorption by Roots
2 marksDifficulty: Medium
Distinguish between active and passive absorption of mineral salts by roots.
Original Khojo Papers practice question — not from a past board paper.
Answer
Passive absorption is the movement of ions into the root along a concentration gradient, without the use of energy. Active absorption is the movement of ions against a concentration gradient using carriers in the membrane, and it requires energy from respiration.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
This is why a root that is deprived of oxygen absorbs far fewer salts.
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Absorption by Roots