Leopold Spychala
Leopold Spychala voted up Ray Dart's answer

Protozoa are unicellular organisms with a discrete nucleus and discrete organelles (the things that make the cell work, like mitochondria - the energy converting components). They belong to the eukaryotes (as do we).

Bacteria have no discrete nucleus or organelles (although there may be nucleic matter and other things that make the bacteria "function"). They belong … Read more