A horticultural centre investigated how rose black spot spread between healthy rose plants. Each group started with 20 plants and was kept for 14 days. The results are shown in the table.
| Water reaching leaves | Air movement | Plants with new black spot after 14 days |
|---|---|---|
| No | Still air | 1 |
| Yes | Still air | 7 |
| No | Moving air | 6 |
| Yes | Moving air | 13 |
Use the results to explain how rose black spot is spread between rose plants.
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.