The plants in two fields of the same crop are all stunted. The soil in field A is deficient in nitrate ions. The plants in field B are infected by a fungus. Which method would show which of these two causes is present in a third field?
Measuring the mean height of the crop plants growing in the field
Using a testing kit containing monoclonal antibodies on the plants
Comparing the colour of the leaves with photographs in a manual
Counting the number of stunted plants in a sample of the field
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.