Foxglove plants produce chemicals that are poisonous to animals.
Explain how producing poisonous chemicals helps the foxglove plant to survive.
Some plants produce chemicals that kill bacteria.
Explain why this is useful to the plant.
Give one example of a medicine that was developed from a chemical made by a plant.
Aspirin was developed from a chemical found in willow trees. Aspirin relieves pain but does not kill pathogens.
Explain why aspirin can still be useful to a person who has an infection.
45 exam-style questions on Edexcel GCSE Biology 5.2 Plant and body defences, covering 5.2.1 Physical plant defences, 5.2.2 Chemical plant defences, 5.2.3 Detecting plant diseases, and 5.2.4 Human physical and chemical defences. Each one has a worked solution and a mark scheme showing where the marks go.