Prokaryotes Vs Eukaryotes

Later, the development of optic and electronic microscopes showed game-changing differences in cell organisms, mainly the presence or absence of distinct nucleus, leading Édouard Chatton to distinguish organisms in prokaryotes (without a distinct nucleus) and eukaryotes (with a distinct nucleus) in a paper from 1925. he was the first person to discover the difference between eukaryotic and prokaryotic systems.
(Eukaryotes are either single-celled or multi-celled organisms such as animals, plants, fungi, and insects. Bacteria are an example of prokaryotes. Prokaryotic cells do not contain a nucleus.)
Herbert proposed a four-kingdom system, moving prokaryotic organisms, bacteria and algae into the separate kingdom Monera. The idea of a ranking