Some ecology students investigated the population size of marsh gentian (Gentiana pneumonanthe) plants in an L-shaped meadow.
The diagram below shows the dimensions of the meadow:
The students:
- Placed a 1 m×1 m1\text{ m} \times 1\text{ m}1 m×1 m square quadrat at 10 random positions across the meadow.
- Counted the number of marsh gentian plants inside each quadrat.
Their results are displayed in the table below:
| Quadrat number | Number of marsh gentian plants |
|---|---|
| 1 | 5 |
| 2 | 9 |
| 3 | 4 |
| 4 | 8 |
| 5 | 3 |
| 6 | 7 |
| 7 | 11 |
| 8 | 6 |
| 9 | 5 |
| 10 | 12 |
Estimate the total population of marsh gentian plants in the meadow. Give your answer in standard form.
Adaptations, interdependence and competition Questions
Practise AQA GCSE Biology Adaptations, interdependence and competition with exam-style questions for Foundation and Higher tier. 32 questions covering Communities, Abiotic factors, Biotic factors, and Adaptations, matched to the AQA GCSE Biology (8461) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.