A plant is grown for six weeks in soil that contains very little magnesium. Which sign is the plant most likely to show?
Yellowing of the leaves between the veins
Small dark spots spreading across the leaves
Swollen growths on the surface of the stem
Areas of soft decay on the lower leaves
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.