During a hailstorm, some of the leaf cells in a crop are damaged and their cellulose cell walls split.
Explain why the damaged leaves have an increased risk of infection by microorganisms.
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.