Which statement explains how antibiotic resistance develops in a population of bacteria?
Answer and explanation
Correct answer: B. Random mutation makes resistant bacteria
- Step 1: Mutations occur at random in some bacteria. Step 2. Antibiotics kill the non-resistant ones and the resistant survivors reproduce. Answer: Random mutation produces resistant bacteria, which survive and reproduce when antibiotics are used. Why not the others: Resistance is not caused by the antibiotic.
Practise more Infection, Photosynthesis, Respiration and Hormones.
Free questions with an explanation for every one, and full timed UK GCSE mock tests.
More Infection, Photosynthesis, Respiration and Hormones questions
- Which type of organism causes the disease malaria?
- How does a vaccine give protection against a disease?
- Why are antibiotics not used to treat viral infections?
- What is the role of white blood cells called phagocytes?
- In photosynthesis, which two substances are the reactants?
- Which factor would not directly limit the rate of photosynthesis?