Which of the following are unique in that they fix CO₂ as their sole carbon source?
A) organotrophs and iron oxidizers
B) photoheterotrophs and chemiolithotrophs
C) photoautotrophs and lithotrophs
D) heterotrophs and methanogens
E) methanogens and photoheterotrophs

Question

Quizplus · Accepted Answer

Photoautotrophs and lithotrophs are unique in that they fix CO₂ as their sole carbon source. Photoautotrophs use energy from light to convert CO₂ into organic compounds, while lithotrophs oxidize inorganic compounds to generate energy and fix CO₂ through the Calvin cycle.

Which of the Following Are Unique in That They Fix