A student grew batches of seedlings in solutions with the same nitrate concentration. Each batch had the same number of root hair cells. The student measured the mean length of the root hair extensions and the amount of nitrate absorbed in 10 minutes.
| Mean extension length (mm) | Nitrate absorbed in 10 minutes (µmol) |
|---|---|
| 0.4 | 3.1 |
| 0.8 | 4.7 |
| 1.2 | 6.2 |
Describe the pattern in the results and explain how the length of the extensions could account for it.
80 exam-style questions on Edexcel GCSE Biology 6.2 Transport in plants, covering 6.2.1 Root hair cell adaptations, 6.2.2 Structure of xylem and phloem, 6.2.3 Transpiration and stomata, 6.2.4 Translocation of sucrose, 6.2.5 Leaf structure for photosynthesis, 6.2.6 Environmental factors on water uptake, 6.2.7 Rate calculations for transpiration, and 6.2.8 Plant adaptations to extreme environments. Each one has a worked solution and a mark scheme showing where the marks go.