group of archaea, Asgard , the closest prokaryotic organisms to eukaryotes , has been discovered . The most recent view is that eukaryotes have evolved from an archaea that has incorporated bacteria. “This idea comes from the work of Lynn Margulis who defended the ancestral bacterial nature of the mitochondria. Taking into account this current of thought, it was proposed that there are two ancestral domains , Archaea and Bacteria , both prokaryotic, and the third domain , Eukaryota , which has evolved from the fusion of the previous two ”, explains Damien Devos. It is thus avision of two ancestral domains of the tree of life (Fig. 1A). Electron micrograph of a cell of Gemmata obscuriglobus, a bacterium of the phylum Planctomycetes. Its developed

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membrane system is observed, as well as its condensed DNA. Only one ancestral domain: Bacteria Damien Devos and his team, including the researcher Elena Rivas-Marín and the doctoral student Iran WhatsApp Number List Carlos Santana-Molina , have dedicated more than 10 years of study to the bacteria of the phylum Planctomycetes . “These bacteria are very particular, they have characteristics that are not typically found in bacteria but that are sometimes associated with the organisms of the other two domains, Archaea and Eukaryota . These characteristics include its developed endomembrane system, its condensed DNA, the presence of sterol in the membrane -in some- or membrane-coating proteins, among others ”, Devos explains. Thus, these scientists propose that

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there is only one ancestral domain, Bacteria . One of these bacteria, belonging to the phylum Planctomycetes , began to diverge and develop characteristics that are not usually seen in bacteria. Thus, the CABD scientific team proposes, based on these characteristics and published knowledge, that these bacteria are our oldest ancestors. Damien Devos claims a radical change in the relationships between the 3 domains of the tree of life, where evolutionary relationships are taken into account . “In this way, the vision of evolution and of these groups changes in a brutal way, where the branch that leads to the appearance of eukaryotes and archaea is derived from Planctomycetes bacteria “, says the CABD researcher (see figure). This proposal is

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