Which process allows water and mineral salts to be absorbed from the soil into a root?
ADiffusion
BIrritability
CMass flow
DOsmosis
Answer & Solution
Correct answer: D. Osmosis
1. Water moves from the soil into the root hair cell across a semi-permeable membrane.
2. Movement of water across a semi-permeable membrane is osmosis by definition.
3. Diffusion is the movement of particles from high to low concentration, but without the membrane requirement.
4. Mass flow is bulk movement of substances driven by a pressure difference between two regions.
5. Irritability is detecting and responding to environmental change, which is not a transport process at all.
_Source: NECTA CSEE 2022 Biology 033, Question 1: Multiple Choice Items, item (vii)_
Keep practising Transport of Materials in Living Things
Browse all Transport of Materials in Living Things questions for CSEE (Form 4), or explore more Biology topics.