What is/are the most popular theory/theories on how the nucleus evolved? I know mitochondria came from alpha-proteobacteria, chloroplasts from cyanobacteria and that eukaryotes evolved directly from archaea, but what about the nucleus?
In summary these two review provide evidence for the following statements:
- The nuclear pore complex is well conserved with some regions of divergence.
- The nuclear lamina appears quite variable between major supergroups.
- Centrosomes are ancient structures but exhibit a complex evolutionary history.
- There is evidence for prokaryotic ancestors of some nuclear components.
- Analysis of divergent organisms is essential to fully understand nuclear biology and its origins.