A coastal grassland reserve has a total area of 2400 m2.
A surfaced path covers 15% of the reserve. Plantain plants cannot grow on the path.
An ecologist counts plantain plants using square quadrats with sides of length 0.40 m. The quadrats are randomly positioned in the grassland.
| Quadrat | Number of plantain plants |
|---|---|
| 1 | 4 |
| 2 | 8 |
| 3 | 5 |
| 4 | 7 |
| 5 | 6 |
| 6 | 9 |
| 7 | 3 |
| 8 | 6 |
Calculate the estimated number of plantain plants in the reserve.
83 exam-style questions on AQA GCSE Biology 7.2 Organisation of an ecosystem, covering 7.2.1 Levels of organisation, 7.2.2 How materials are cycled, 7.2.3 Decomposition, and 7.2.4 Impact of environmental change (HT only). Each one has a worked solution and a mark scheme showing where the marks go.