Explanation

Kingdom-Monera includes all prokaryotic autotrophic or heterotrophic organisms$\ viz.,$ mycoplasms, bacteria, Actinomycetes (mycelia bacteria) and photosynthetic cyanobacteria. On the other hand, all unicellular eukaryotic organisms like flagellates, diatoms, dinoflagellates, slime moulds, sarcodina, etc, are grouped under kingdom-Protista.