A crop adviser investigates two unrelated problems affecting pak choi plants grown in stacked trays at an indoor farm.
The adviser classifies the first problem as communicable. What is meant by this classification?
The fertiliser supplied to healthy trays contains magnesium ions. Give the substance that the plants make using these ions.
Plants in a second set of trays are making too little protein. Name the mineral ion that should be added to their feed.
The plants remain short of the mineral ion named in part (c). Name the visible sign expected in these plants.
133 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.