Protozoa Bacteria 9 Algae 8 Fungi 8 Industrial microbiology 8 Environmental Microbiology 6 Microorganism 6 Zoology 6 Metazoa 3 Parasitology 3 Amoebae 2 Arthropods 2 Ciliophora 2 Drosophila 2 Environmental microbiology 2 Helminths 2 Invertebrates 2 Medical parasitology 2 Micro organism 2 Nematoda 2 Parasites 2 Sex Determination Mutation 2 fungi 2 Acanthocephala 1 Agricultural entomology 1 Amoeba 1 Anatomy and Morphology (Wild Animals), (New March 2000) 1 Animal Ecology 1 Animal Immunology, (New March 2000) 1 Animal kingdom 1