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Venus as possible future of the Earth

... conditions on the Earth and the evolution of its biosphere has been and will be the average temperature of the Earth’s surface. Two and a half billion years ago, when this temperature was 48–50 °С, the biosphere consisted solely of prokaryotes (bacteria and archaea), the simplest single-celled organisms, with a total biomass of 400–500 Gt (gigatons) of carbon. Seven hundred million years after, the surface temperature dropped below 30 °С, leading to the appearance of eukaryotes , i....

Modified: 13.12.2016
Venus , Earth , planet evolution , life evolution , bacteria , climate , atmosphere , volcanism
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Bacteriophages: The Enemies of Our Enemies

Bacteriophages (in Greek, those that devour bacteria) or just phages are the viruses able to kill bacteria. According to the latest data, the main role played in nature by these “bacteria killers,” which are the most abundant cell organisms on Earth, is to considerably accelerate organic matter ...

Modified: 30.08.2014
bacteriophage , lytic phage , bacteria , infection , phage therapy
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Bacteriophages: The Enemies of Our Enemies

Bacteriophages (in Greek, those that devour bacteria) or just phages are the viruses able to kill bacteria. According to the latest data, the main role played in nature by these “bacteria killers,” which are the most abundant cell organisms on Earth, is to considerably accelerate organic matter ...

Modified: 14.12.2013
bacteriophage , lytic phage , bacteria , infection , phage therapy
Path: Главная / Articles
Journey to the Invisible World

... distinguishes microorganisms from all other living beings on Earth is their potential immortality. Microorganisms reproduce through binary fission, that is, divide in two, which means that they have no predecessors, no dead ancestors. The genome of living bacteria contains all the changes that have taken place in themselves, and not in their late parents — this is their peculiar “life chronicle”. In effect, microorganisms are “clones” and as such they are equivalent. Thanks to this feature, it ...

Modified: 25.08.2007
microorganisms , geysers , hot springs , bacteria , genome , evolution , origin of life
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The Planet's Long Youth

... “participators” of that event are still living, safe and sound. For some reason, people find the crossopterygians much more impressive living samples of the fossil world than the fine filaments of blue-green spirulinas, though the latter, modest cyanobacteria, have remained true to themselves through the billion-years long history of the Earth… Any general problem concerning the origin and mode of life of the earliest biota is sure to lead scientists, whatever be their field, to microbiology,...

Modified: 30.05.2005
Zavarzin , bacteria , RNA , Earth , biomass , eukaryotes , evolution , evolution of life , genes
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Transgenic Relatives

... gradual mutation – this would have been too long an evolutionary process. This is a pulsed phenomenon related to the fact that genes can be transferred from one organism to another, bringing in fundamentally new characteristics The first complete bacterial genome was decoded only in 1995. Since then, the number of deciphered genomes has been increasing rapidly. Today, comparative analysis of genomes opens up a real possibility of revising our views on the origin and evolution of species. The basic ...

Modified: 30.09.2004
genome , DNA , gene transfer , genetic information , human , bacteria , evolution
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Microbes: Keeping it Going

... of analysis of large systems, on a top-down basis, from particular to general, which is exactly how we will try to treat the evolution of microbial communities. SHORTLY AFTER LIFE SPRANG TO LIFE First of all, Earth’s early biosphere was created by bacteria or, to put it more precisely, prokaryotes , i.e., unicellular organisms lacking a nucleus. Because, except for single occurrences of metamorphed Archaean rocks, we have no geological evidence to be sure of what the prokaryotic biosphere was ...

Modified: 30.05.2004
organisms , evolution , microorganisms , bacteria , life
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