Microbiology
Microbiology (from Greek , "mīkros", "small"; , "bios", "life"; and , "-logia") is the study of microorganisms, those being unicellular (single cell), multicellular (cell colony), or acellular (lacking cells). Microbiology encompasses numerous sub-disciplines including virology, parasitology, mycology and bacteriology.
American Microscopical Society
The current research goals of "Invertebrate Biology" describes its research goals as spanning the fields of "morphology and ultrastructure, genetics and phylogenetics, evolution, physiology and ecology, neurobiology, behavior and biomechanics, reproduction and development" and includes "cell and molecular biology related to all types of invertebrates: protozoan and metazoan, aquatic and terrestrial, free-living and symbiotic".