Experiment: Two types of bacteria were placed in identical petri dishes: one with antibiotic resistance genes and one without. Both were exposed to the same antibiotic.Observation: Only the resistant bacteria survived and multiplied.Question: What does this demonstrate?
Correct answer: C. Genetic resistance provides survival advantage under antibiotic pressure.
- A. All bacteria are killed regardless of resistance.
- B. Antibiotics enhance bacterial reproduction.
- C. Genetic resistance provides survival advantage under antibiotic pressure.
- D. Resistance has no evolutionary importance.
Explanation
The correct answer is Option C: Genetic resistance provides survival advantage under antibiotic pressure. This is supported by the observation that only the bacteria with antibiotic resistance genes survived and multiplied when exposed to the antibiotic. This demonstrates the crucial role of genetic resistance in conferring a survival advantage in the presence of antibiotics. The other options are incorrect because they do not align with the observation provided in the question.
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About Scientific Reasoning
Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
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