Mint plants and witch hazel plants make chemicals that are used in mild antiseptics. Which type of plant defence do these chemicals provide?
Poisons that deter herbivores from eating the plant
Physical barriers that stop microorganisms getting in
Antibacterial chemicals that kill or stop bacteria growing
Mechanical adaptations that make the plant hard to eat
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.