An infected plant is taken to a laboratory. How is the pathogen usually identified there?
The leaves are compared with photographs in a gardening manual
The DNA in the sample is analysed and matched to a known pathogen
The plant is grown in fresh soil until the signs of disease return
The plant is sprayed with a pesticide to remove any pests present
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.