Predict5 marksStandard
An experiment was set up to investigate the effect of light intensity, carbon dioxide concentration, and temperature on the rate of photosynthesis in the aquatic plant Elodea. The rate was measured by counting the number of oxygen bubbles produced per minute. The results are shown in the table below.
| Condition | Light intensity (lux) | CO₂ concentration (ppm) | Temperature (°C) | Rate (bubbles/min) |
|---|---|---|---|---|
| 1 | 5000 | 300 | 20 | 25 |
| 2 | 10000 | 300 | 20 | 50 |
| 3 | 10000 | 600 | 20 | 50 |
| 4 | 10000 | 600 | 30 | 75 |
Predict which factor (light intensity, carbon dioxide concentration, or temperature) is limiting the rate of photosynthesis at condition 1 and at condition 2. For each prediction, explain your reasoning fully.