Scientists count three species in a woodland at the same time each year. Temperature and rainfall remain similar.
The table shows their results.
| Year | Species P | Species Q | Species R |
|---|---|---|---|
| 1 | 80 | 120 | 40 |
| 2 | 60 | 140 | 40 |
| 3 | 40 | 160 | 40 |
| 4 | 20 | 180 | 40 |
A student concludes that the community is stable because the total number of organisms is unchanged.
Which judgement is best supported?
The conclusion is supported because the total population count stays constant.
The conclusion is supported because the environmental conditions stay fairly constant.
The conclusion is unsupported because stable communities require equal species counts.
The conclusion is unsupported because individual species counts show sustained changes.
40 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.