A bacterial pathogen entered the body of a farmed fish. Scientists took equal-volume samples of fluid from around the infected tissue.
| Time after infection in hours | Number of bacteria per cm³ of fluid | Area of damaged tissue in mm² |
|---|---|---|
| 4 | 2,000 | 1 |
| 8 | 8,000 | 4 |
| 12 | 32,000 | 15 |
Use the data to explain why the area of damaged tissue increased between 4 hours and 12 hours.
252 exam-style questions on AQA GCSE Biology 3.1 Communicable diseases, covering 3.1.1 Communicable (infectious) diseases, 3.1.2 Viral diseases, 3.1.3 Bacterial diseases, 3.1.4 Fungal diseases, 3.1.5 Protist diseases, 3.1.6 Human defence systems, 3.1.7 Vaccination, 3.1.8 Antibiotics and painkillers, and 3.1.9 Discovery and development of drugs. Each one has a worked solution and a mark scheme showing where the marks go.