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Billions of years ago cyanobacteria gained photosynthesis to generate their own food from the sun. This released a lot of oxygen in the atmosphere, which should have poisoned the bacteria. Somehow, they gained the ability to resist oxygen damage. tags bacteria oxygen dna evolution abiogenesis natural selectionThe "Catch-22" problem is how did they evolve the ability before there was a need? Scientist feel they may have discovered the reason. picked by 2manyusernames 2 years ago |
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