Root hair cells take in nitrate ions from the soil.
The Table shows the concentration of nitrate ions in the soil water and in the cytoplasm of a root hair cell.
Table
| Location | Concentration of nitrate ions in arbitrary units |
|---|---|
| soil water | 2 |
| cytoplasm of root hair cell | 50 |
Name the process that root hair cells use to take in nitrate ions from the soil.
Use the information in the Table to explain why nitrate ions cannot enter the root hair cell by diffusion.
After heavy rain, the soil around the roots becomes waterlogged. Waterlogged soil contains very little oxygen.
Explain why the root hair cells take in fewer nitrate ions when the soil is waterlogged.
41 exam-style questions on Edexcel GCSE Biology 1.4 Transport across cell membranes, covering 1.4.1 Transport into and out of cells and 1.4.2 Percentage gain and loss in osmosis. Each one has a worked solution and a mark scheme showing where the marks go.