A student measures photosynthesis under different conditions.
The table shows the results.
Table
| Treatment | Light intensity in arbitrary units | Carbon dioxide concentration in % | Temperature in ∘C^\circ\text{C}∘C | Rate in arbitrary units |
|---|---|---|---|---|
| P | 2 | 0.04 | 20 | 4 |
| Q | 4 | 0.04 | 20 | 4 |
| R | 4 | 0.08 | 20 | 7 |
| S | 4 | 0.08 | 30 | 9 |
Which conclusion is supported?
Carbon dioxide limits Q; light intensity limits R.
Temperature limits Q; carbon dioxide limits R.
Carbon dioxide limits Q; temperature limits R.
Light intensity limits Q; temperature limits R.
44 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.