Which of the Following Did Early Methanogens Use from the Early

question 17

Multiple Choice

Which of the following did early methanogens use from the early atmosphere to generate energy?

• A) CO₂ and H₂
• B) H₂O and O₂
• C) CH₄ and CO₂
• D) N₂ and O₃
• E) O₂ and H₂

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