I'm not 100% on this but this is what I came up with.
A few examples of unicellular organisms include amoeba, bacteria, and paramecium.
Another example is Eukaryotes which have a nucleus, and a more complex cell structure.
Archaea
Amoeba
Yeasts
Paramecia
Cyanobacteria
Staphylococcus Aureus, Amoeba, Paramecium, Vorticella