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The early atmosphere of the Earth had no oxygen. It was first produced when bacteria developed the green pigment that made photosynthesis possible. In which of the following groups is the sequence in which organisms appeared on Earth presented correctly?
endothermic
The fossils in rock layer D are older than those in layer A.
sewage contamination of water supplies
nongreen bacteria, green bacteria, animals
Reveal Answer
Correct Answer:
nongreen bacteria, green bacteria, animals
Explanation:
Correct answer: nongreen bacteria, green bacteria, animals
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