A fungal infection spreads between ash trees. A student proposes controlling mosquitoes to prevent it.
Why is the proposal unlikely to interrupt the main transmission route?
the fungus is transmitted in water rather than in blood
the fungus is transmitted by direct sexual contact rather than bites
the fungus is transmitted by oral contact rather than body fluids
the fungus is transmitted by airborne spores rather than mosquitoes
43 exam-style questions on Edexcel GCSE Biology 5.1 Health and communicable disease, covering 5.1.1 Communicable and non-communicable diseases, 5.1.2 Disease susceptibility interactions, 5.1.3 Pathogens as disease-causing organisms, 5.1.4 Common infections, 5.1.5 Spread and prevention of pathogens, 5.1.6 Lifecycle of a virus, and 5.1.7 Spread and prevention of STIs. Each one has a worked solution and a mark scheme showing where the marks go.