Describe5 marksChallenge
A student investigated the effect of light intensity on the rate of photosynthesis in an aquatic plant (Elodea canadensis). The rate was measured by counting the number of oxygen bubbles released per minute at different distances from a lamp (light intensity in arbitrary units). The results are shown in the table.
| Light intensity (arbitrary units) | Bubbles per minute |
|---|---|
| 0 | 0 |
| 10 | 5 |
| 20 | 10 |
| 30 | 14 |
| 40 | 16 |
| 50 | 17 |
| 60 | 17 |
Describe why the rate of oxygen bubble production levels off at high light intensities, even though the light intensity continues to increase.