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 water
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Which of the following is NOT a mechanism of how microbes are able to reach deep subsurface portions of the crust?
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- Which of the following statements is NOT as description of soil? A. Varying nutritional content. B. Phototropic microbes are found only on the top few centimeters. C. A homogenous layer of organic and inorganic material. D. The area around the plant soil usually has the highest microbial populations.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.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. Bioremediation
- Which of the following is true of microbial biofilms? A. Biofilms are restricted to freshwater environments. B. Biofilms typically are small because resources such as nutrients and oxygen are unable to circulate through them. C. Cells within the biofilm are encased within a layer of polysaccharide. D. Biofilms almost always consist of only a single bacterial speciesSecondary metabolites of microbes are formed during thephase of growth.a. exponential b. stationary c. lag d. deathMicrobes are found in whichhabitat?a. human bodyb. earth’s crustc. oceansd. all of the above
- Which of the following is not one of the six major elements microbes need tosurvive, grow, and reproduce?a. oxygenb. calciumc. sulfurd. nitrogene. carbonAn over growth of microbes can decrease dissolved oxygen levels to the point where organisms cannot survive True or false ?Which of the following statements related to fracking (hydraulic fracturing) is correct? A. The fracking process does not increase the efficiency and well productivity. B. The fracking process uses very little liquid, and only uses sand. C. The most commonly used liquid for fracking is water with a number of chemicals added that are toxic or cancerogenic. D. If the fracking liquid is returned to the surface, it is already purified by the soil and does not need further treatment. E. Fracking for natural gas is considered a sustainable energy technology due to its high efficiency.
- Which of the following describes a bacterium that lives in the human intestine and causes disease? A. commensalist B. decomposer C. gut mutualism D. symbiotic pathogenBioaugmentation: 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.If a forensic report came back indicating that the greatest proportion of microbes found on the tissues were species of firmicutes and ascomycota, the remains would be most accurately described as O a. fresh remains, with blood pooling in the extremities and extremely rigid muscles. Ob.actively decaying remains, accompanied by strong odors and release of fluids. O c. dry remains, mainly bone and cartilage. O d.bloated remains, with anaerobic bacteria producing a lot of gases. O e. loss of remains, no tissues are found, only a high concentration of these microbes in the soil.