Researchers grew young plants of a species used in rooftop gardens for 14 days. The plants were the same age and had similar starting heights. The light intensity, temperature, soil moisture and mineral content were kept the same for all the plants; only the wind speed was changed.
| Wind speed in m/s | Mean water loss per plant per day in g | Mean increase in shoot height in mm |
|---|---|---|
| 0.2 | 3.5 | 22 |
| 2.0 | 6.2 | 13 |
| 5.0 | 10.1 | 4 |
Explain what the results show about the effect of wind speed on shoot growth, and use the experimental design to justify whether wind speed is likely to have caused the differences.
82 exam-style questions on AQA GCSE Biology 7.1 Adaptations, interdependence and competition, covering 7.1.1 Communities, 7.1.2 Abiotic factors, 7.1.3 Biotic factors, and 7.1.4 Adaptations. Each one has a worked solution and a mark scheme showing where the marks go.