Among the following protistans, choose the ones with flagellated vegetative cells.
I. Gonyaulax
II. Diatoms
III. Slime moulds
IV. Euglena
Among the protistans, flagellated vegetative cells are seen in Dinoflagellates like Gonyaulax, Euglenoids and flagellated protozoans like Trypanosoma. Vegetative cells of diatoms, and slime moulds do not have flagella.