Scientists compared three areas. They recorded the number of antibiotic courses prescribed for viral infections per 1000 people and the percentage of bacterial samples from each area that were antibiotic-resistant.
| Area | Antibiotic courses prescribed for viral infections per 1000 people | Bacterial samples that were antibiotic-resistant (%) |
|---|---|---|
| P | 10 | 8 |
| Q | 40 | 24 |
| R | 70 | 41 |
Explain the relationship shown by the data. Predict what is likely to happen to the proportion of resistant bacteria if unnecessary antibiotic prescribing is reduced.
85 exam-style questions on Edexcel GCSE Biology 4.1 Evolution and natural selection, covering 4.1.1 Work of Darwin and Wallace and 4.1.2 Resistant organisms and evolution. Each one has a worked solution and a mark scheme showing where the marks go.