However, it's important to note that the classification of life into five kingdoms (Animalia, Plantae, Fungi, Protista, and Monera) is an older system. Modern classification uses a three-domain system:
* Bacteria: Includes all true bacteria.
* Archaea: Includes extremophiles and other unique prokaryotes.
* Eukarya: Includes all organisms with eukaryotic cells (plants, animals, fungi, and protists).
So while Monera used to be the kingdom for prokaryotes, the current, more accurate classification puts prokaryotes into the Bacteria and Archaea domains.