Protists are classified as eukaryotic organisms. This means that their cells contain a nucleus and other membrane-bound organelles, which is a key characteristic of eukaryotes.
The eukaryotic structure of protists allows for greater complexity and specialization compared to prokaryotic cells, which lack a defined nucleus. Protists can be unicellular or multicellular, and they exhibit a wide range of forms and functions, from amoebas and algae to paramecia.
In summary, all protists are eukaryotic, distinguishing them from prokaryotic organisms like bacteria and archaea, which have a simpler cellular organization.