Sergei Winogradsky Choose one: A. identified microbes using biotechnology. B. developed a pure culturing system using agar. C. discovered microbial fermentation. D. discovered chemolithotrophs in natural environments.

D. discovered chemolithotrophs in natural environments.

Explanation:

Sergei Winogradsky is a Microbiologist, an Ecologist and a soil scientist from Russia who discovered chemolithotrophy mode of nutrition while studying a particular genus of bacteria.

He found that the bacteria genus had the ability to oxidize hydrogen sulfide with deposition of sulfur.