On the basis of nuclear organization the cellular microbes can further be grouped into two:
(i) Prokaryotes, (ii) Eukaryotes.
Prokaryotic microorganisms are those that possess incipient nucleus that lacks nuclear membrane, nucleoplasm and nucleolus. Examples are : archaebacteria, cyanobacteria and eubacteria. In contrast, the eukaryotic microorganisms possess a well developed nucleus with nuclear membrane, nucleoplasm and nucleolus. Examples are : micro algae, protozoans, slime moulds and microfungi.
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