how do you not know this as a dental student...eukaryotes can be both unicellular and multicellular. prokaryotes also can be both unicellular and multicellular. it's just that multicellular eukaryotes and unicellular prokaryotes are COMMON.
i guess people also assume it's multicellular since eukaryotic cells are more complicated than prokaryotic cells b/c they are nucleated and have membrane-bound organelles. people think bacteria when they think prokaryotic cells and unicellular but they can be multicellular too.