BI-509
Osmosis
Biology · Secondary 3 · Hard · Osmosis
A student investigates osmosis using leaf stalks and four sucrose solutions: 0.1, 0.3, 0.5 and 0.7 mol dm⁻³. Why must each stalk be completely covered by the sucrose solution during the experiment?
- So all parts of the stalk are equally exposed to the sucrose solution for osmosis to occur.
- So that air can diffuse out of the stalk more quickly.
- To increase the surface area of the stalk.
- To prevent sucrose from entering the stalk cells.
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