Equal masses of the same species of alga were exposed to different colours of light. The light intensity and all other conditions were kept the same.
| Colour of light | Mean volume of oxygen collected in 20 minutes in cm³ |
|---|---|
| Red | 1.20 |
| Green | 0.28 |
| Blue | 1.16 |
Explain the differences in the volumes of oxygen collected.
68 exam-style questions on AQA GCSE Biology 4.1 Photosynthesis, covering 4.1.1 Photosynthetic reaction, 4.1.2 Rate of photosynthesis, and 4.1.3 Uses of glucose from photosynthesis. Each one has a worked solution and a mark scheme showing where the marks go.