Everything about Acytota totally explained
Non-cellular life is
life that exists without
cells. This term usually is applied to earth-based life, and presumes the
phylogenetic classification of
viruses as lifeforms.
In discussing the
taxonomic domains of life, the terms
Acytota or
Aphanobionta are occasionally used as the name of a
viral kingdom, domain, or
empire. The corresponding
cellular life name would be
Cytota.
Non-cellular organisms and cellular life would be the only two subdivisions of earthly life -- also known as terrestrial organisms,
Biota,
Naturae, or Vitae.
The issue of life
without cellular structure came to the fore with the
2003 discovery that the large and complex
Mimivirus can make some
proteins that are involved in the synthesis of proteins. This discovery suggests the possibility that some viruses may have evolved from earlier forms that could produce proteins independent of a host cell. If so, there may at one time have been a
viral domain of life. Also, since most viruses have not been isolated and studied, it's theoretically possible that there may still be some undiscovered viruses on
Earth that can produce their own
proteins without the aid of a host cell. It isn't clear that all small viruses have originated from more complex viruses by means of genome size reduction. A viral domain of life may only be relevant to certain large viruses such as
nucleocytoplasmic large DNA viruses like the
Mimivirus.
When considering non-cellular life, besides
viruses, other forms might also be included, like
viroids,
satellites,
transposons,
plasmids,
phagemids,
cosmids,
fosmids and
prions.
The notion of non-cellular life has also occurred in debates about the possible forms of
extraterrestrial life.
Further Information
Get more info on 'Acytota'.
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