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Which of the following events is NOT a common among microbes in the air?
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- Describe the roles of microbes in: a. The formation of root nodules and The Rhizosphere c. The Ruminant Stomach d. The causes and consequences of algal blooms e. Life in deep sea vents (Tubeworms) f. Coral Reefs and Bleaching g. BioremediationAn over growth of microbes can decrease dissolved oxygen levels to the point where organisms cannot survive True or false ?Which of the following factors is a unique event in the evolution of the niche of microbes? A. Variable surrounding conditions B. High mutation rates C. Transfer of DNA D. Selection among microbial populations
- Which microbe is NOT found present in water with eutrophication events(s)? A. Nitromonas sp. B. Bacteroides sp. C. Anabaena sp. D. CyanobacteriaWhich of the following is not one of the six major elements microbes need tosurvive, grow, and reproduce?a. oxygenb. calciumc. sulfurd. nitrogene. carbonWhich of the following statements DOES NOT describe nitrogen fixing bacteria? A. Can be found only as a symbiotes associated with the root nodules of legumes. B. Maybe be present in soil. C. Converts atmospheric nitrogen to organic nitrogen. D. Composed of many species of bacteria.
- What is the difference in microbial population from water sediment and neustonic source? A. Ratio of phototrophic and heterotrophic microbes. B. Ratio of anaerobic microbes to aerobic microbes. C. Ratio of heterotrophic and cellulolytic microbes. D. All statements are acceptable descriptions.Which of the following is NOT a mechanism of how microbes are able to reach deep subsurface portions of the crust? A. Water leaching B. Via gaps in the crust layer. C. Microbial degradation of top surface material D. Ground waterWhat area is NOT a potential source of an extremophile microbe? A. Microwave oven B. Wild honey C. Glacier D. Soil
- An infectious dose of several million cells in enteric infections seems like a lot. a. In terms of the size and abundance of microbes, could you see a cluster containing that many cells with the naked eye? b. About how long would it take an average bacterial species to reach the infectious dose of a million cells starting from a single cell? c. Why do enteric diseases require a relatively higher infectious dose than nonenteric diseases? d. Explain why antimicrobic therapy used on gram-negative bacterial infections could actually lead to illness rather than cure itWhich of the following is not considered a microorganism?a. alga b. bacterium c. protozoan d. fleaBioaugmentation: A. adds specific microorganisms to a contaminated site. B. aims at enhancing the growth of the resident population of microbes. C.usually utilizes genetically engineered bacteria. D. is typically done offsite. E.depends on competition between resident and added microbes.