This has been one my mind for a short bit.
Did all eukaryotic cells evolve from the first eukaryotic cell, or did they evolve independently multiple times? Multicellular life evolved multiple times and it feels like eukaryotic cells would be similar. If they evolved just from cells internalizing other symbiotic cells and this happened multiple times to give eukaryotes multiple organelles, it seems reasonable to me that there'd be multiple moments in history that simple cells evolved this way.
Yet from what I've found through google, it seems eukaryotic cells all started from a single species. Why is that or is there something I'm misunderstanding?
Did all eukaryotic cells evolve from the first eukaryotic cell, or did they evolve independently multiple times? Multicellular life evolved multiple times and it feels like eukaryotic cells would be similar. If they evolved just from cells internalizing other symbiotic cells and this happened multiple times to give eukaryotes multiple organelles, it seems reasonable to me that there'd be multiple moments in history that simple cells evolved this way.
Yet from what I've found through google, it seems eukaryotic cells all started from a single species. Why is that or is there something I'm misunderstanding?