Which Statement Is NOT True About the Formation of Early

question 20

Multiple Choice

Which statement is NOT true about the formation of early organisms?

• A) The first organisms were anaerobic because the atmosphere was devoid of oxygen.
• B) The original electron donor for photosynthetic processes was probably H₂S.
• C) Oxygen, a powerful oxidant, was probably welcomed by anaerobic organisms as a preferable choice for metabolic reactions.
• D) The transfer of electrons to O₂ releases more energy than transferring electrons to SO₄^2-
• E) Cyanobacteria are modern descendants of early photosynthetic oxygen-producers.

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