A researcher studies four populations of the same bird species during the same breeding season. The populations live in similar habitats.
| Population density (birds per km²) | Females that produce young (%) |
|---|---|
| 2 | 30 |
| 5 | 48 |
| 11 | 66 |
| 20 | 75 |
Using the data, explain how population density could affect reproduction in this bird species.
92 exam-style questions on Edexcel GCSE Biology 3.1 Reproduction and meiosis, covering 3.1.1 Advantages and disadvantages of reproduction and 3.1.2 Role of meiotic cell division. Each one has a worked solution and a mark scheme showing where the marks go.