| Monera | Protista |
| Unicellular prokaryotic cellular structure. | Unicellular eukaryotic cellular structure. |
| Cellular organelles are absent. | Cellular organelles are present. |
| It can be autotrophic or heterotrophic. | It can be holozoic or parasitic or photosynthetic. |
| Examples include Mycobacteria, Bacillus, Sporohalobacter, Clostridium, Halobacterium. | Examples include red algae, slime molds, euglena, and water molds. |