Mention four major groups of protozoans, each with one example.

Four major groups of protozoans:

1) Amoeboid protozoans e.g. Amoeba

2) Flagellate protozoans e.g. Trypanosoma

3) Cilliated protozoans e.g. Paramoecium

4) Sporozoans protozoans e.g. Plasmodium