A grower in a remote field needs to know within minutes whether one particular virus is present in a crop. Which method should the grower use, and why?
A gardening manual, because it lists the signs of many plant diseases
A laboratory test, because DNA analysis identifies the pathogen exactly
A testing kit, because its antibodies bind one pathogen out in the field
A gardening website, because photographs can be compared with the crop
58 exam-style questions on AQA GCSE Biology 3.3 Plant disease, covering 3.3.1 Detection and identification of plant diseases and 3.3.2 Plant defence responses. Each one has a worked solution and a mark scheme showing where the marks go.