Mic 205 Learnsmart - Environmental Microbiology Questions Well Answered Latest Update 2026

MIC 205 LEARNSMART - ENVIRONMENTAL MICROBIOLOGY QUESTIONS WELL ANSWERED LATEST UPDATE 2026 the oxidation of ammonium to nitrate or nitrite in the nitrogen cycle is known as - Answers nitrification organisms that provide the fundamental energy source that drives the trophic pyramid - Answers producers biome is a climactic region characterized by (3) - Answers 1. latitude 2. altitude 3. dominant plant form correct sequence of events in the hydrologic cycle (3) - Answers 1. exposure of surface water to the sun 2. evaporation of surface water 3. condensation or precipitation as rain or snow the accumulation of pollutants such as mercury, PCB, and synthetic chemicals in producers, increasing in concentration as it moves up the trophic flow of the ecosystem is known as - Answers bioaccumulation the overall role that a species or population serves in a community is known as its - Answers niche microorganisms supported by soil include (3) - Answers 1. algae 2. bacteria 3. viruses the process that converts unusable organic matter from dead organisms back into their essential inorganic elements and returns them to their nonliving reservoirs to make them available again for living organisms - Answers recycling part of the biosphere that encompasses the earth's crust including all rocks and minerals - Answers lithosphere besides existing in elemental form, sulfur also exists in nature as (3) - Answers 1. sulfide gas 2. sulfate 3. thiosulfate an organism's _______ is the physical location to which it has adapted; its niche is its overall role in a community - Answers habitat all water on the earth is contained in the - Answers hydrosphere elements such as carbon, nitrogen, and phosphorus are constantly cycled in the - Answers biogeochemical cycle in the hydrologic cycle, water leaves the surface of the earth through (3) - Answers 1. respiration 2. transpiration 3. evaporation the process that removes nitrogen from the air and converts it to a form usable by living beings - Answers nitrogen fixation clustered associations of organisms that live together in the same place and time that exhibit interrelationships in their nutrition and behavior - Answers community feed on other organisms and obtains energy from bonds present in the organic substrates they contain - Answers consumer factors that influence microbial distribution in fresh water environments include (3) - Answers 1. nutrient availability 2. oxygen levels 3. temperature involves the circulation of nitrogen from sources in the non-living environments into living things and back to the non-living environment - Answers nitrogen cycle the area surrounding the roots of plants containing bacteria, fungi, and protozoa in a mutualistic relationship is called the - Answers rhizosphere the lithosphere is important because it (3) - Answers 1. serves a dynamic role in biochemical cycles 2. serves as a repository for organic detritus 3. serves as a repository for dead terrestrial organisms the study of microbes in their natural habitat - Answers microbial ecology most abundant component of the atmosphere - Answers nitrogen gas microbes that live 2 miles or more beneath the surface metabolize petroleum to carbon dioxide at a rate of a _____ times slower than those at the surface - Answers million bacteria that fix nitrogen and live symbiotically with legumes - Answers rhizobia plants that produce seeds in pods - Answers legumes climatic region characterized by a dominant plant form, altitude, and latitude - Answers biome compounds in which nitrogen can be found in the earth (5) - Answers 1. proteins 2. nitrites 3. nucleic acids 4. ammonium 5. nitrates the end of the nitrogen cycle when nitrogen compounds are returned to the reservoir in the air - Answers denitrification the chief inorganic reservoir of phosphate in nature is - Answers fluorapatite abiotic factors include (5) - Answers 1. atmospheric gases 2. water 3. minerals 4. light 5. temperature sequences of _____ in a sample taken from soil or water are compared with known samples in order to discover new species of bacteria - Answers DNA simplest representation of feeding relationships among organisms - Answers food chain ______ are active at all levels of the food pyramid - Answers decomposers all of the following pertain to the atmosphere except - Answers it includes all the rocks and minerals of the Earth more intimately associated with the energy transfers and trophic patterns in the biosphere than are other elements - Answers carbon cycle phase of the nitrogen cycle in which ammonia is released from decomposing organic material and is subsequently used in the process of nitrification - Answers ammonification all of the following pertain to the lithosphere except - Answers comprises all the water bodies on earth an organism whose sole source or carbon is atmospheric carbon dioxide - Answers autotroph subterranean water-bearing strata of permeable rock, sand, or gravel - Answers aquifers