Yes and no.
All unicellular eukaryotic organisms fall under the kingdom Protista and are thusly called "protists."
Kingdom Protista contains complex single-celled organisms.
microorganisms
microorganisms
bacteria, protista, plantae
Kingdom Protista consists mostly of single-celled and simple multicelluular organisms.
Protozoans are diverse group of organisms in Kingdom protista.
All unicellular eukaryotic organisms fall under the kingdom Protista and are thusly called "protists."
Kingdom Protista contains complex single-celled organisms.
Kingdom Monera is mainly made up of prokaryotic organisms and kingdom protista is mainly made up of eukaryotic organisms.
The first eukaryotes are most likely to belong to the Protista kingdom. These are mostly multicellular organisms with the earlier ones including organisms like Kneallhazia solenopsae and many more.
It includes mostly unicellular organisms that do not fit into the other kingdoms.
Kingdom Protista contains complex single-celled organisms.
microorganisms
both
microorganisms
bacteria, protista, plantae