Evolution of eukaryotic cell or the prokaryotic cell

Question

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

Answer 1

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