Which of these would be recorded as a sign that a plant may be diseased?
A waxy cuticle covering the upper surface of the leaves
Areas of soft decay on the stem and on the fruit
Root hair cells with a large surface area for absorption
Guard cells opening the stomata during the daytime
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.