A student counts bubbles released by pondweed.
The table shows the results.
Table
| Light intensity | Number of bubbles in 1 minute | Mean volume of one bubble in cm3\text{cm}^3cm3 |
|---|---|---|
| Low | 20 | 0.020 |
| High | 30 | 0.010 |
Which conclusion is supported by these results?
Gas volume per minute increases although bubble number decreases.
Gas volume per minute decreases although bubble number increases.
Gas volume per minute doubles although bubble number increases.
Gas volume per minute stays constant although bubble number increases.
44 exam-style questions on Edexcel GCSE Biology 6.1 Photosynthesis, covering 6.1.1 Photosynthetic organisms as producers, 6.1.2a Limiting factors on the rate of photosynthesis, 6.1.2b Interactions of limiting factors on photosynthesis, and 6.1.3 Inverse square law and light intensity. Each one has a worked solution and a mark scheme showing where the marks go.