Compléter Microbiology Fill-in-the-BlankVersion en ligne Use this activity to revise some basic prinicples of microbiology! par Natalia Bilton 1 pathogens three diverse Viruses protists nomenclature disease photosynthesis infection Protozoa microbes broad Helminths Animalia taxonomic beer DNA bacteria molds phylogenetic animals Eukaryotes references plant prokaryotes health larvae Microorganisms ( or ) are living organisms that are generally too small to be seen without a microscope . Throughout history , humans have used microbes to make fermented foods such as , bread , cheese , and wine . Long before the invention of the microscope , some people theorized that and disease were spread by living things that were too small to be seen . They also correctly intuited certain principles regarding the spread of and immunity . Carolus Linnaeus developed a system for categorizing organisms into related groups . Binomial assigns organisms Latinized scientific names with a genus and species designation . A tree is a way of showing how different organisms are thought to be related to one another from an evolutionary standpoint . The first phylogenetic tree contained kingdoms for plants and ; Ernst Haeckel proposed adding kingdom for . Robert Whittaker ? s tree contained five kingdoms : , Plantae , Protista , Fungi , and Monera . Carl Woese used small subunit ribosomal RNA to create a phylogenetic tree that groups organisms into domains based on their genetic similarity . Bergey ? s manuals of determinative and systemic bacteriology are the standard for identifying and classifying bacteria , respectively . Bacteria can be identified through biochemical tests , / RNA analysis , and serological testing methods . Microorganisms are very and are found in all three domains of life : Archaea , Bacteria , and Eukarya . Archaea and bacteria are classified as because they lack a cellular nucleus . Archaea differ from in evolutionary history , genetics , metabolic pathways , and cell wall and membrane composition . Archaea inhabit nearly every environment on earth , but no archaea have been identified as human . studied in microbiology include algae , protozoa , fungi , and helminths . Algae are - like organisms that can be either unicellular or multicellular , and derive energy via . are unicellular organisms with complex cell structures ; most are motile . Microscopic fungi include and yeasts . are multicellular parasitic worms . They are included in the field of microbiology because their eggs and are often microscopic . are acellular microorganisms that require a host to reproduce . The field of microbiology is extremely . Microbiologists typically specialize in one of many subfields , but all professionals need a solid foundation in clinical microbiology .
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