A student measures the rate of photosynthesis of pondweed at different temperatures. Light intensity and carbon dioxide concentration are kept constant.
| Temperature (°C) | Rate of photosynthesis (cm³ oxygen per hour) |
|---|---|
| 10 | 2 |
| 20 | 6 |
| 30 | 9 |
| 40 | 3 |
Explain the pattern in the results.
117 exam-style questions on OCR GCSE Biology 1.4 Photosynthesis, covering 1.4.1 Photosynthesisers as biomass producers, 1.4.2 Factors affecting the rate of photosynthesis, and 1.4.3 Limiting factors in photosynthesis. Each one has a worked solution and a mark scheme showing where the marks go.