A single-celled alga is surrounded by pond water. The alga has a partially permeable cell membrane.
| Location | Relative concentration of solution |
|---|---|
| Pond water | Dilute |
| Cell contents of the alga | Concentrated |
Name the process responsible for the net movement of water molecules across the cell membrane.
State the direction of the net movement of water molecules.
State what happens to the difference in concentration between the pond water and the cell contents as water moves.
140 exam-style questions on AQA GCSE Biology 1.3 Transport in cells, covering 1.3.1 Diffusion, 1.3.2 Osmosis, and 1.3.3 Active transport. Each one has a worked solution and a mark scheme showing where the marks go.