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