A student uses a potometer to measure the rate of water uptake by a leafy shoot under four different sets of conditions.
The Table shows the results.
Table
| Condition | Light | Air movement | Temperature in ∘C^\circ\text{C}∘C | Rate of water uptake in mm3\text{mm}^3mm3 per minute |
|---|---|---|---|---|
| A | dark | still air | 20 | 0.5 |
| B | bright light | still air | 20 | 2.0 |
| C | bright light | fan | 20 | 4.4 |
| D | bright light | still air | 30 | 3.6 |
Use the data and your knowledge of transpiration to explain the results.
114 exam-style questions on OCR GCSE Biology 2.2 The challenges of size, covering 2.2.1 Exchange surfaces and surface area : volume ratio, 2.2.2 Substances transported in organisms, 2.2.3 The human circulatory system, 2.2.4 The heart and blood vessels, 2.2.5 Red blood cells and plasma, 2.2.6 Uptake of water and mineral ions by plants, 2.2.7 Transpiration and translocation, 2.2.8 Xylem and phloem, 2.2.9 Environmental factors and water uptake, and 2.2.10 Using a potometer. Each one has a worked solution and a mark scheme showing where the marks go.