A health centre can use a laboratory test to determine whether a patient's respiratory infection is caused by bacteria or a virus. Test results take two days. The health centre is considering giving an antibiotic immediately to every patient while the result is awaited.
Discuss whether the health centre should introduce this policy.
Include in your answer how repeated use of the policy could change a population of bacteria over time.
85 exam-style questions on Edexcel GCSE Biology 4.1 Evolution and natural selection, covering 4.1.1 Work of Darwin and Wallace and 4.1.2 Resistant organisms and evolution. Each one has a worked solution and a mark scheme showing where the marks go.