The bacteria and archaea that inhabited the early Earth oxidized inorganic compounds to obtain energy to fix carbon dioxide. These organisms were probably least likely to oxidize which inorganic compound?
A) carbon.
B) hydrogen.
C) ammonium.
D) methane.

Question

Quizplus · Accepted Answer

Carbon is not typically oxidized by bacteria and archaea to obtain energy, as it is already in a reduced form in organic compounds.

The Bacteria and Archaea That Inhabited the Early Earth Oxidized