A researcher discovers a new prokaryote that lives on the seafloor near hydrothermal vents. This organism reduces CO₂ to form C₆H₁₂O₆, and also derives energy from H₂ (by oxidation). This prokaryote is a:

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The organism derives energy from H₂ by oxidation, which indicates that it is a chemotroph. It also reduces CO₂, indicating that it is a chemoautotroph, meaning it derives energy from inorganic compounds and can produce its own organic compounds.

A Researcher Discovers a New Prokaryote That Lives on the Seafloor