They're also more similar to Eukaryotes on the genetic level than bacteria.
The eukaryote is termed as the embryo,
in humans, 8 weeks past the fertilization.
Eucarya may refer to: Eukaryotes, organisms whose cells contain complex structures inside the membranes.
It is possible that Eukaryotes themselves originated from horizontal gene transfers between bacteria and archaea.
Archaeans, bacteria, and Eukaryotes continued to diversify
and to become more complex and better adapted to their environments.
They have an analogous structure in prokaryotes and Eukaryotes, but differing in mass, which is smaller in the former.
Like it did 2 billion years ago,
when a certain bacterium(eukaryote) learned how to metabolize oxygen(that is,
breathe) and how to reproduce by meiotic sex.