The table shows cholera cases in two villages of equal population over the same period.
Table
| Village | Drinking-water supply | Cholera cases |
|---|---|---|
| P | treated water | 8 |
| Q | untreated river water | 48 |
Which conclusion is supported by these data?
using treated water is associated with fewer cholera cases
using treated water guarantees that cholera cannot occur
cholera is transmitted only between people in village Q
cholera cases are independent of the drinking-water supply
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.