Evolution of prokaryotic or eukaryotic cell

Question

Which kind of cell came first in the evolution of prokaryotic or eukaryotic cell?

Answer 1

This is a fascinating trouble of biological evolution. The most customary hypothesis asserts that the simpler cell, the prokaryotic cell, appeared early on in evolution than the more complicated eukaryotic cell. The endosymbiotic hypothesis, for illustration, affirms that aerobic eukaryotic cells emerged from the mutualist ecological interaction among primitive anaerobic eukaryotes and aerobic prokaryotes.