PRESENT ORGANIZED BACTERIAL COLONIES - SO ME IDEAS OVER THE EVOLUTIONOF PROKARYOTES

During the course of thorough experimental investigations over live ca rbonate-precipitating bacterial consortiums, an embryonic organization of cells has been observed. Besides, other kinds of bacterial organiz ed assemblages have been found in various present natural and experime ntal environments. Such present organized bacterial communities deserv e a full description and, together with possible fossil counterparts s ince Precambrian times, open an enlarged discussion over their ecologi cal and biological signification and the history of the procaryotic wo rld, if not the first steps of the eucaryotic world of ''higher'' life . Incidently, the role of such multicells bacterial assemblages must b e considered for the genesis of spheroidal mineral bodies with concent ric and or radial structures.