Explain6 marksChallenge
A student investigated the effect of light intensity and temperature on the rate of photosynthesis in Elodea canadensis. The rate was measured by counting oxygen bubbles produced per minute. The results are shown in the table.
| Light intensity (arbitrary units) | Rate at 15°C (bubbles min⁻¹) | Rate at 25°C (bubbles min⁻¹) |
|---|---|---|
| 0 | 0 | 0 |
| 100 | 10 | 11 |
| 200 | 18 | 20 |
| 400 | 25 | 35 |
| 800 | 28 | 45 |
Explain the effect of temperature on the rate of photosynthesis at low and high light intensity. Use the data to identify which factors are limiting the rate under different conditions.