Correct: The emergence of self-replicating molecules marked the beginning of biological evolution. A: Oxygen production evolved later. C: Multicellularity appeared much later. D: Photosynthesis was not an initial requirement. Concept: Transition from chemical to biological evolution.
Correct: The emergence of self-replicating molecules marked the beginning of biological evolution. A: Oxygen production evolved later. C: Multicellularity appeared much later. D: Photosynthesis was not an initial requirement. Concept: Transition from chemical to biological evolution.