Describe the 4 kingdoms that comprise the domain prokarya?

The domain Prokarya consists of the kingdoms Bacteria, Archaea, Viruses, and viroids. Bacteria and Archaea are single-celled organisms with prokaryotic cells, while viruses and viroids are acellular infectious particles. Bacteria are diverse and found in various environments, while Archaea are often extremophiles. Viruses and viroids are not considered living organisms and require a host for replication.