Because hardly any oxygen (O₂) was in the early Earth's atmosphere, the single-celled microorganisms probably used which of the following to produce energy to drive metabolic processes?

Question

Quizplus · Accepted Answer

Given the lack of oxygen in the early Earth's atmosphere, single-celled microorganisms would have relied on anaerobic cellular respiration to produce energy, as this process does not require oxygen.

Because Hardly Any Oxygen (O2) Was in the Early Earth's

Because Hardly Any Oxygen (O₂) Was in the Early Earth's