A tomato plant infected with tobacco mosaic virus has pale patches on its leaves. The mass of tomatoes the plant produces falls. Which statement links the pale patches to the smaller mass of tomatoes?
The pale areas contain less chlorophyll, so less glucose is made
The pale areas contain fewer stomata, so less water is lost by leaves
The pale areas contain less starch, so less glucose can be stored
The pale areas contain fewer nitrates, so less protein can be made
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.