Scientists investigate how wind and soil moisture affect the survival of seedlings of a grassland plant. They grow equal numbers of seedlings in four groups for four weeks. Fans produce either light wind or strong wind, and the soil is kept at either a low or a suitable moisture level. Other conditions are controlled.
| Wind | Soil moisture | Percentage of seedlings surviving |
|---|---|---|
| Light | Low | 40 |
| Light | Suitable | 92 |
| Strong | Low | 22 |
| Strong | Suitable | 86 |
Describe the effects of soil moisture and wind on seedling survival shown by the results.
Suggest an explanation for the effect of strong wind on the seedlings growing in low soil moisture.
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.