The parameceum can reproduce asexually and sexuallly while the other 2 can only do it asexually. they have diifferent structures (Google the images) and the euglena has a flagellum while the paramecium has cilia and they eat differently. the amoeba works its pseodopotium around its food and digests it in the food vacuale the paremecium uses the cilia to get a water current going and the food gets sucked in and the euglena uses photosynethesis by using its stigma to indicate areas of light and if not then it will just get food like the other 2
plants
No -- both are types of algae. Volvox is a colony that resembles a golf ball while Euglena is solitary and tiny. Both do have tiny whips (flagella).