the study of bacteria (a small single-celled prokaryotic organism)
the study of fungi (group of eukaryotes that include both microscopic eukaryotes ,mold, yeast, and larger organisms (mushrooms, puffballa))
the study of simple, photosynthetic eukaryotes. The algae, ranging from single-celled forms to large seaweeds.
The study of protozoa. Animal-like and mostly single- celled eukaryotes.
The study of viruses. Minute, non-cellular particles that parasitize cells.
The study of paracitisism and parasidic organisms. Including pathogenic protozoa, helminth worms, and certain insects.