Explain5 marksStandard
The table shows the rate of photosynthesis (in arbitrary units) measured at different carbon dioxide concentrations under two light intensities: low (200 μmol m−2 s−1) and high (800 μmol m−2 s−1).
| CO2 concentration / ppm | Rate at low light / arb. units | Rate at high light / arb. units |
|---|---|---|
| 100 | 10 | 10 |
| 200 | 18 | 20 |
| 400 | 25 | 35 |
| 600 | 30 | 50 |
| 800 | 30 | 60 |
| 1000 | 30 | 60 |
Explain the effect of carbon dioxide concentration and light intensity on the rate of photosynthesis, using the concept of limiting factors.