Experiment: Chick embryos were incubated in sealed containers with varied oxygen levels (5%, 15%, 21%). Their growth was monitored for a week.Observation: Embryos in 21% oxygen developed normally, those in 5% showed poor growth and deformities.Question: What conclusion can be made?
Correct answer: A. Oxygen is critical for proper embryonic development.
- A. Oxygen is critical for proper embryonic development.
- B. High oxygen prevents all deformities.
- C. Embryonic development is unaffected by oxygen.
- D. 5% oxygen accelerates cell division.
Explanation
The correct answer is that oxygen is critical for proper embryonic development. This conclusion is supported by the experiment's findings where embryos in 21% oxygen developed normally, while those in 5% oxygen experienced poor growth and deformities. The other options are incorrect as they do not align with the observed outcomes of the experiment.
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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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