3 ms·
Twice, not three times. And the second in an organism that already achieved symbiogenesis. All of this took around 2 billion years or so to happen. It is a pot
by _hypx_ 3y ago
Twice, not three times. And the second in an organism that already achieved symbiogenesis. All of this took around 2 billion years or so to happen.
It is a potential great filter candidate, but we only have a sample size of one. So if it turns out the above set of events is rare, then the prokaryote-eukaryote transition would be a major barrier to intelligent life.
- adastra22 3y agoThree times. There is a very small, not extensively developed branch of life that has a separate primary symbiogebesis event (incorporating cyanobacteria) in the very recent evolutionary past, separate from mitochondria and chloroplasts: https://en.m.wikipedia.org/wiki/Paulinella https://en.m.wikipedia.org/wiki/Paulinella
- _hypx_ 3y agoWhich would be the third time in nearly 4 billion years. Still pretty unlikely. Both second and third examples are with an organism that already achieved the eukaryotic stage. It's still not clear if the original shift was a likely event.