Multicellular Life Evolution
The cluster discusses the origins and rarity of multicellular organisms, focusing on transitions from unicellular prokaryotes to eukaryotes via endosymbiosis (e.g., mitochondria), the absence of multicellular bacteria, and evolutionary challenges like symbiogenesis.
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Might be referring to this: https://newatlas.com/biology/life-merger-evolution-symbiosis...
Can someone explain why there arent more multicellular bacteria?
why can't they just say "first multi-cellular organism"
Multicellular life seems to have appeared independently from unicellular life several times in the past, including 6 instances of complex multicellular life from eukaryotic cells, that led to animals and land plants. It may also have happened repeatedly, with some disappearing altogether in course of time. Another important aspect of life is the extreme prevalance of symbiosis, even among unicellular life. It's even theorized that the genesis of the entire Eukaryota domain and many of its o
A point to consider is the probability that microbes ever evolve into something more complex (multicellular organisms). After all, there are huge amounts of bacteria on Earth these days, but I'm not aware of any cases of them evolving into more complex organisms in the last billion year or so.A book called "Power, Sex, Suicide: Mitochondria and the Meaning of Life" provides some insights. The author argues that the only reason multicellular organisms evolved is that one type of cells ("host")
Not yet, it seems to be an open question.See: "The Mystery of the Missing Multicellular Prokaryotes"https://www.quantamagazine.org/the-mystery-of-the-missing-mu...
> Are we a result of similar microorganisms?I'm no biologist, but from what I've read: Probably not. A really important fact about multicellular life is that each cell is genetically identical to any other cell in the organism. Otherwise, different cells will start competing with one another, until the relationship falls apart. In nature, symbiosis only works because each cell has an independent means of reproduction, and that always puts a limit to how close the cooperation can
It's even theorized that the genesis of the entire Eukaryota domain and many of its organnelles (notably mitochondria and chloroplasts) are the results of repeated cellular endosymbiosis where a unicellular organism consumed a prokaryote that eventually becomes a useful part of the host cell instead of its food.A parallel could be drawn with CVCs acquiring startups. Or tiger penis soup. Neither being generally palatable dinner table conversation, but both similarly unlikely consum
So what is it that they have in place of mitochondiria?A fascinating book "Power, Sex, Suicide: Mitochondria and the Meaning of Life" (http://www.amazon.com/Power-Sex-Suicide-Mitochondria-Meaning...) suggested that the multicellullar organisms on Earth evolved only once, when the symbiotic relationship between two types of bacteria was formed - one of them became "host", and the other becam
Perhaps even by biological cells!