A horticultural propagation unit grows ornamental plants. TMV has been detected in one donor plant. During grafting, a technician uses the same knife and work surface for material from several donor plants.
Suggest two changes to the grafting procedure that would reduce the risk of transferring TMV from the infected donor plant to other 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.