Scientific consensus supports the idea that living organisms require oxygen. then, a scientist discovers a type of bacteria that metabolizes sulfur instead of oxygen, and thus survives in environments without oxygen. the scientist concludes that a diverse group of many different organisms could live in an oxygen-free environment. why should are some scientists skeptical of the scientist’s results and conclusion?

the conclusion shows the scientist is not open-minded.

the results will be difficult for scientists to reproduce.

the conclusion needs to be supported by more evidence

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