The figure shows four diseased plants in a garden, labelled W, X, Y and Z.
Figure: Four diseased plants in a garden, labelled W, X, Y and Z

Give the letter of the plant that has a disease caused by a fungus.
Give the letters of the two plants that have a non-communicable disease.
Name the mineral ion that plant Z is short of.
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.