Experiment: To test photoperiodism, plants were exposed to 8, 12, and 16 hours of light daily. Flowering time was recorded.Observation: Plants under 12 hours light flowered earlier than others.Question: What does this indicate?
Correct answer: A. Plants respond to light duration to regulate flowering.
- A. Plants respond to light duration to regulate flowering.
- B. More light always delays flowering.
- C. Light has no effect on plant reproduction.
- D. Darkness is harmful to flower development.
Explanation
The correct answer is that plants respond to light duration to regulate flowering. This conclusion is drawn from the observation that plants under 12 hours of light flowered earlier than those under 8 or 16 hours. The other options are incorrect because they do not align with the specific results of the experiment or make unfounded assumptions about the relationship between light and plant flowering.
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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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