What are the main differences between single celled protist and bacteria?

Single-celled protists are eukaryotic organisms, meaning they have a defined nucleus and membrane-bound organelles, whereas bacteria are prokaryotic, lacking a nucleus and such organelles. Protists can be more complex in structure and can be autotrophic or heterotrophic, while bacteria can be classified as autotrophic, heterotrophic, or even chemotrophic. Additionally, protists often reproduce sexually or asexually, while bacteria primarily reproduce asexually through binary fission. Lastly, protists are usually larger than bacteria and can exhibit more diverse forms and functions.