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“If amino acids can only be made where there is no free oxygen in the atmosphere, and porphyrins can only be made when there is free oxygen, then these things needed by every cell could not have existed together to form the first cell! What’s more, many of these compounds are antagonistic. They will combine and destroy each other—anywhere except within a living cell.” — Lawrence O. Richards
If amino acids can only be made where there is no free oxygen in the atmosphere, and porphyrins can only be made when there is free oxygen, then these things needed by every cell could not have existed together to form the first cell! What’s more, many of these compounds are antagonistic. They will combine and destroy each other—anywhere except within a living cell.