This edition: Viruses, Bacteria, and Protistans
The program begins with a historical view of the science of classification from the Carl Linnaeus-based system to the five kingdoms that are used in classification today.
The second segment examines bacterial and viral threats to the community through food. Bacteria account for half of the history of life on Earth. They are defined and the subkingdoms of archaebacteria and eubacteria are described. An animation illustrates their incredibly swift reproductive processes. Further, Alex McPherson explains why viruses are not considered to be part of the five kingdoms of life.
Finally, in an exploration of the kingdom of protistans, Dr. Peter Franks discusses plankton, dinoflagellates, and phytoplankton. His work centers on studies of the algae that cause “Red Tide.”