A microbe (mcrobial) is a microscopic organism. Microbes can be multi-cellular or single-celled organisms and include bacteria, protozoa, and some fungi and algae. Microbes can be found in every type of environment, and play a crucial role in ecosystems because they act as decomposers. Microbes can be either beneficial or harmful to plants.
Microbes are also referred to as microorganisms.
Microbiology is the study of microorganisms, which are unicellular or cell-cluster microscopic organisms. This includes eukaryotes such as fungi and protists and prokaryotes such as bacteria and certain algae. Viruses are also included.