CAMPBELL BIOLOGY IN FOCUS-TEXT,AP ED.
3rd Edition
ISBN: 9780136811206
Author: Urry
Publisher: SAVVAS L
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Chapter 42, Problem 7TYU
Summary Introduction
Introduction:
The process of removing the pollutants from the ecosystem by the help of natural remediation, mainly microorganisms is called bioremediation. The polluted water bodies, soil, and air are targeted by the microorganisms. The process is a very useful approach to the betterment of ecosystem.
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What is one of the primary benefits of bioremediation?
Group of answer choices
A. to improve human health with the help of living organisms such as bacteria
B. to clean up areas polluted with toxic compounds by using bacteria
C. to improve soil quality for plant growth by using bacteria
D. to improve bacteria for production of useful chemicals
Which of the following statements about the nitrogen cycle is false? a. Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4 +). b. Denitrification by bacteria converts nitrates (NO3 −) to nitrogen gas (N2). c. Nitrification by bacteria converts nitrates (NO3 −) to nitrites (NO2 −). d. Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.
Explain how bioremediation is achieved by microorganisms in the following
a. Bioremediation of Uranium-contaminated environment b. Bioremediation of hydrocarbon c. Bioremediation of pesticides
Chapter 42 Solutions
CAMPBELL BIOLOGY IN FOCUS-TEXT,AP ED.
Ch. 42.1 - Why is the transfer of energy in an ecosystem...Ch. 42.1 - WHAT IF? You are studying nitrogen cycling on the...Ch. 42.1 - MAKE CONNECTIONS Use the second law of...Ch. 42.2 - Why is only a small portion of the solar energy...Ch. 42.2 - How can ecologists experimentally determine the...Ch. 42.2 - Prob. 3CCCh. 42.2 - Prob. 4CCCh. 42.3 - If an insect that eats plant seeds containing 100...Ch. 42.3 - WHAT IF? Detritivores are consumers that obtain...Ch. 42.4 - Prob. 1CC
Ch. 42.4 - Prob. 2CCCh. 42.4 - Prob. 3CCCh. 42.5 - Prob. 1CCCh. 42.5 - How do bioremediation and biological augmentation...Ch. 42.5 - Prob. 3CCCh. 42 - Prob. 1TYUCh. 42 - Which of these ecosystems has the lowest net...Ch. 42 - Prob. 3TYUCh. 42 - Prob. 4TYUCh. 42 - Which of the following has the greatest effect on...Ch. 42 - Prob. 6TYUCh. 42 - Prob. 7TYUCh. 42 - Prob. 8TYUCh. 42 - INTERPRET THE DATA Draw a simplified global water...Ch. 42 - SCIENTIFIC INQUIRY Using two neighboring ponds in...Ch. 42 - Prob. 11TYUCh. 42 - FOCUS ON ENERGY AND MATIER Decomposition typically...Ch. 42 - Prob. 13TYU
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- Define the following terms:a. nitrogen fixationb. nitrogenasec. nitrogen assimilationd. amino acid poole. nitrogen cyclearrow_forwardDefine the following terms: a. nitrogen fixation b. MoFe protein c. Fe protein d. nitrogen assimilation e. dead zonearrow_forwardNitrogen is fixed in ecosystems in ways stated below. Which one of the statements below is false? A. By cyanobacteria B. By electrical discharges in the atmosphere C. By industrially synthesised fertilizer D. By denitrificationarrow_forward
- Which of the following factors would explain why there is a decreasing trend of microbial population from top to bottom? A. There is a shift in the condition form oxic to anoxic. B. All statements are acceptable. C. The soil particles become larger and not weathered. D. There is a decrease in the available nutrients.arrow_forwardWhich of the following statements DOES NOT describe microbes in an aquatic system? A. Bacterial and archaeal species are equally represented in freshwater and marine. B. Contains a large number of viruses. C. Converts dissolved organic carbon to utilizable forms of higher trophic level organisms. D. Possess several anti-predation mechanisms.arrow_forwardConsider figure 49.8 in the textbook. Please choose all applicable options. a.The data shows that the ability of invasive ants to invade is dependant on zone dryness. b.The data shows that the ability of invasive ants to invade is dependant on abiotic factors. c.The data shows that the ability of invasive ants to invade is dependant on the presence of native ants. d.The data shows that the ability of invasive ants to invade is dependant on biotic factors.arrow_forward
- Which of the following statement is INCORRECT?A. Bacteria can decompose organic nitrogen.B. Biological nitrogen fixation is carried out by bacteria.C. Ammonia, ammonium ion and nitrate ion are examples of biological availablenitrogen.D. Denitrifying bacteria converts atmospheric dinitrogen gas into nitrate ion.E. Nitrification is the process of converting reactive nitrogen into another form ofreactive nitrogen.arrow_forwardInaquatic ecosystems, the major agents of decomposition are:a.aquatic fungi.b.bacteria.c.algae.d.detritivorous fish.e.piscivorous fisharrow_forwardExplain the "phosphate trap" in the estuary of Chesapeake Bay. Why was a local ban on phosphorus in detergents not particularly helpful in mitigating eutrophication in the estuary?arrow_forward
- Which statement offers the best explanation of how deforesting hubbard brooks watershed (W2) affected the nitrogen cycle? 1. Denitrification rates increased, resulting in a decrease in the export of ammonium 2. Microbial immobilization rates increased, resulting in a decline in stream nitrogen 3. Mineralization rates increased, causing the export of ammonium to increase 4. plant uptake nitrogen stopped, resulting in an increase in the export of nitratearrow_forwardFigure 20.12 Which of the following statements about the nitrogen cycle is false? a. Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4+) . b. Denitrification by bacteria converts nitrates (NO3) to nitrogen gas (N2) . c. Nitrification by bacteria converts nitrates (NO3) to nitrites (NO2) . d. Nitrogen fixing bacteria convert nitrogen gas (N2) into organic compounds.arrow_forwardThe process whereby oxygen is depleted by the growth of microorganisms due to excess nutrients in aquatic systems is called _________. a. dead zoning b. eutrophication c. retrophication d. depletionarrow_forward
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