9. Which is the most correct order of the theorized evolution of life on Earth?
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1 point
Single-celled organisms produced methane, cyanobacteria produced oxygen, multi-cellular organisms began to form, fish, amphibians, reptiles and then mammals
Cyanobacteria produced oxygen, Single-celled organisms produced methane, multi-cellular organisms began to form, fish, amphibians, reptiles and then mammals
Mammals formed, then fish, then reptiles, amphibians, multi-cellular organisms, cyanobacteria and then single-celled organisms produced methane
Multi-cellular organisms, then fish, amphibians, reptiles, mammals, single-celled organisms produced greenhouse gases