Moneran and Protistan
- Acrasiomycota
- agar
- algae
- ameba
- amoeba
- archaea
- Archaebacteria
- Ascomycota
- bacillus
- bacteria
- bacteriophage
- Basidiomycota
- blue-green algae
- bracket fungi
- brewer's yeast
- brown algae
- C. difficile
- carrageen
- Chlorophyta
- Chrysophyta
- Chytridiomycota
- Ciliophora
- Clostridium
- coralline algae
- cyanobacteria
- cytomegalovirus
- death angel
- denitrifying bacteria
- desmid
- Deuteromycota
- diatom
- Dinoflagellata
- E. coli
- Escherichia coli
- Euglenophyta
- foraminiferan
- Fungi
- green algae
- gulfweed
- Iceland moss
- Irish moss
- Jaffna moss
- kelp
- lichen
- Mastigophora
- Metazoa
- mildew
- mold
- Monera
- MRSA
- mushroom
- Myxomycota
- nekton
- nitrifying bacteria
- nitrogen-fixing bacteria
- Oomycota
- Opalinida
- paramecium
- Phaeophyta
- phage
- plankton
- plasmodium
- pond scum
- prokaryote
- Protista
- Protozoa
- protozoan
- puffball
- Pyrrhophyta
- red algae
- red tide
- retrovirus
- Rhodophyta
- Saccharomyces
- Sarcodina
- Sargassum
- sea lettuce
- seaweed
- slime mold
- Sporozoa
- staphylococcus
- streptococcus
- Streptomyces
- thallophyte
- toadstool
- truffle
- trypanosome
- virus
- water mold
- yeast
- zooplankton
- Zygomycota
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