O Level Biology Home Tutors in DHA Islamabad for Cambridge Students
Pak Home Tutors helps families in DHA Islamabad request O Level Biology home tuition or online tutors matched to syllabus needs.
Diffusion vs Osmosis: Same Core Idea, Different Situations
Both involve particles moving from higher concentration to lower concentration. Osmosis is the special case of water moving across a partially permeable membrane.
Quick contrast
- Diffusion: any particles (e.g. oxygen in air); membrane not required
- Osmosis: water only; needs a partially permeable membrane
Plant cells in pure water swell as water enters by osmosis. In strong sugar solution, water leaves and the cell shrinks from the wall (plasmolysis).
O Level Biology tutors in DHA Islamabad can use one table of particle / membrane / direction for every exam question on this topic.
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