{"thcode":2,"term":{"code":735,"name":"microbiology","parent":650,"scope":"Branch of biology dealing with organisms too small to be seen without the use of a microscope."},"uf":[],"bt":[{"code":650,"name":"life sciences","parent":1019,"scope":"Branches of science that study living and fossil organisms."},{"code":1019,"name":"sciences","parent":1,"scope":"Major educational fields, fields of study, and professional groupings within USGS."},{"code":1,"name":"Categories","parent":null,"scope":"Thematic terms for categorizing information resources.  This thesaurus is intended to support finding and understanding scientific information."}],"nt":[{"code":77,"name":"bacteriology","parent":735,"scope":"Study of the single celled microorganisms known as bacteria."},{"code":1279,"name":"virology","parent":735,"scope":"Branch of biology dealing with viruses and viral diseases."}],"rt":[{"code":56,"name":"archaea","parent":843,"scope":"Microscopic organisms of the domain Archaea living on a diet of hydrogen and carbon dioxide, once thought to be bacteria, and often inhabiting extreme environments, such as thermal vents and hot springs, extremely alkaline and acidic waters, hypersaline water, and anoxic habitats."},{"code":76,"name":"bacteria","parent":843,"scope":"Single celled microorganisms, beneficial or pathogenic, without a nuclear membrane."},{"code":224,"name":"culturing (specimens)","parent":619,"scope":"Growing microorganisms, tissue cells, or other living matter in a specially prepared nutrient medium for diagnostic or scientific use."},{"code":370,"name":"faunal and floral census (microscopic)","parent":619,"scope":"Records of counts of the different microscopic species in a core, soil, sediment, rock or water sample to determine geologic age or other characteristic of the sample.  Use for microscopic examinations."},{"code":903,"name":"plankton","parent":841,"scope":"Floating aquatic plants (phytoplankton) and animals (zooplankton) which are often microscopic and drift with the current in lakes, rivers, and oceans."},{"code":935,"name":"producers (organisms)","parent":841,"scope":"Organisms, chiefly green plants, which use inorganic elements, compounds, and light to produce their food (photosynthesis). They are a source of food for animals."},{"code":940,"name":"protists","parent":843,"scope":"Unicellular eukaryotes (organisms possessing nucleated cells) with affinities to both plants and animals. Classed in the Protista or Potoctista kingdom, they include protozoans, foraminifera, radiolarians, fungi and some algae."}]}