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What did they devour before plant created organics? Other fungi? Organic precursors occurring naturally by chemistry?
by PicassoCTs 6y ago
What did they devour before plant created organics? Other fungi? Organic precursors occurring naturally by chemistry?
- pfdietz 6y agoPhotosynthetic bacteria existed long before plants, which are eukaryotes.
- tiagod 6y agoThey can break down rocks too.
- Teknoman117 6y agoChemoautotrophs are understood to be the earliest form of life on Earth, but photosynthetic bacteria date back 3.4 billion years. Cyanobacteria show up in the fossil record some 700 million years later (oxygen producing photosynthetic bacteria) and 300 million years after that, oxygen existed in sufficient quantities in the atmosphere to appear in the geologic record.