Same chapter2 marksDifficulty: Medium
Distinguish between active and passive absorption of mineral salts by roots.
Absorption by Roots
3 marksDifficulty: Medium
Distinguish between endosmosis and exosmosis, and give one example of each.
Original Khojo Papers practice question — not from a past board paper.
Answer
Endosmosis is the movement of water into a cell when it is placed in a hypotonic solution, as when a raisin swells in water. Exosmosis is the movement of water out of a cell when it is placed in a hypertonic solution, as when a grape shrinks in strong sugar solution.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Both are osmosis; only the direction differs.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
Define turgor pressure and wall pressure, and state the importance of turgidity to a plant.
Absorption by Roots
Same chapter3 marksDifficulty: Medium
What is root pressure and what part does it play in the ascent of sap?
Absorption by Roots
Same chapter3 marksDifficulty: Medium
Describe the structure of a root hair and state how it is adapted for absorption.
Absorption by Roots
Same chapter3 marksDifficulty: Medium
What happens to a plant cell when it is placed in a hypertonic solution?
Absorption by Roots
Same chapter3 marksDifficulty: Medium
Describe an experiment to demonstrate osmosis using a potato osmoscope.
Absorption by Roots