Michigan Most of the sedimentary rocks are of deep water origin. Pillow basalts, indicating subaqueous extrusion. Certain cells ferment organic compounds to produce simple compounds and energy. This is called chemosynthesis . From a mural at the Smithsonian Institution Museum of Natural History.
Amino acids are monomers and have to be joined together to form proteins, whch are polymers .
The earliest cells had to form and exist in anoxic conditions. Likely to be anaerobic bacteria or archaea Probably chemosynthetic, producing H2S or CO2 Heterotrophs. Consumed simple organic compounds. Abundantly available in primordial soup Some of the early organisms became photosynthetic possibly due to a shortage of raw materials for energy. Photosynthesis was an adaptive advantage.