Endosymbiotic Theory
The classification of protists is confusing and overwhelming
     There are a few groups to emphasize:
          Euglena
          Dinanoflagellates
          Ciliates
          Paramecium
          Diatoms
          Brown and Green Algae (Rhodophyta and Chlorophyta are often
          classified in the plant kingdom.
          Choanoflagellates
          Amoeba
          Foraminifera
          Slime molds
          Plasmodium
          Also read pages 510 - 517