Carl Woese (1980) called progenote protobiont or the common ancestor of all organisms and represent the most primitive living unit, but already equipped with the necessary machinery for transcription and gene translation. In this common core would arise in the evolution of prokaryotes three models:
archaea bacteria
urcariotas
Over a period of more than 2000 million years, but there were these cellular forms, as one might think that they adapted to live in all possible environments and "rehearse" all possible mechanisms for their metabolism.
The cellular evolution was closely related to the evolution of the atmosphere and oceans. The most accepted theory is that: first cells would
heterotrophic anaerobic food used as organic molecules in the environment. How are you end up exhausted molecules could have occurred first ecological crisis, had it not been because at some point in cellular evolution ...
some cells learned how to make organic molecules by CO2 fixation and reduction. Thus began photosynthesis, as a process of autotrophic nutrition. The use of water in photosynthesis as an electron donor, had its origin in the release of O2 and therefore the transformation of the reducing atmosphere in the oxidizing atmosphere today conocemos.Empezón a revolution of oxygen that would cause cell death in many ways to that was a poison, others adapt to their presence and ...
learned to use some cells for their metabolic reactions, which resulted in aerobic respiration, by aerobic heterotrophic nutrition.
These forms are organizing prokaryotic cell and are small. From these, it is believed that eukaryotes evolved
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