A scientist places a transparent chamber over a patch of moss. The light intensity is increased at time 0. A sensor records the total carbon dioxide taken up by the moss.
| Time in minutes | Total carbon dioxide taken up in μmol |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 10 |
| 5 | 14 |
| 6 | 18 |
Explain which readings should be used to obtain the best estimate of the steady rate after the light intensity was increased.
Calculate this steady rate of carbon dioxide uptake.
87 exam-style questions on Edexcel GCSE Biology 6.1 Photosynthesis, covering 6.1.1 Photosynthetic organisms as producers, 6.1.2a Limiting factors on the rate of photosynthesis, 6.1.2b Interactions of limiting factors on photosynthesis, and 6.1.3 Inverse square law and light intensity. Each one has a worked solution and a mark scheme showing where the marks go.