Connect With Learnsmart Labs Online Access For Prescott's Microbiology
11th Edition
ISBN: 9781260408997
Author: Joanne Willey
Publisher: Mcgraw-hill Higher Education (us)
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Textbook Question
Chapter 30.3, Problem 6CC
Why do cyanobacteria often dominate waters that have been polluted by the addition of phosphorus?
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Adding high levels of nutrients to a lake or inshore area wouldhave all of the following effects in that environment excepta) death of clams and crabs.b) increased growth of heterotrophic microbes.c) increased growth of photosynthetic organisms.d) increased levels of dissolved O2 .
Organic forms of nitrogen are converted to inorganic forms via what process?
a)photosynthesis
b)consumption
c)nitrogen fixation
d)decomposition
Why are organisms in the abyssal zone of the ocean necessarily halophilic, psychrophilic, barophilic, and anaerobic?
Chapter 30 Solutions
Connect With Learnsmart Labs Online Access For Prescott's Microbiology
Ch. 30.1 - Prob. 1MICh. 30.1 - What factors influence oxygen solubility? How is...Ch. 30.1 - Describe the buffering system that regulates the...Ch. 30.1 - Prob. 3CCCh. 30.1 - What features of a thermocline make it similar to...Ch. 30.2 - How is sulfur cycled between the anoxygenic...Ch. 30.2 - Prob. 1.1CCCh. 30.2 - Prob. 1.2CCCh. 30.2 - How do heterotrophic microbes contribute to the...Ch. 30.2 - Prob. 3MI
Ch. 30.2 - What is marine snow? Why is it important in CO2...Ch. 30.2 - Prob. 2.2CCCh. 30.2 - Prob. 2.3CCCh. 30.2 - Prob. 2.4CCCh. 30.2 - Prob. 2.5CCCh. 30.2 - Explain what is meant by upside-down microbial...Ch. 30.2 - Prob. 2.7CCCh. 30.3 - Figure 30.15 Nutrient Cycling in Antarctic Lakes...Ch. 30.3 - How does the contribution of benthic autotrophs...Ch. 30.3 - Why does water turbulence play only a minor role...Ch. 30.3 - Why is mixotrophy suited for survival in Antarctic...Ch. 30.3 - What is an oxygen sag curve? What changes in a...Ch. 30.3 - What are point and nonpoint source pollution? Can...Ch. 30.3 - Prob. 4CCCh. 30.3 - Prob. 5CCCh. 30.3 - Why do cyanobacteria often dominate waters that...Ch. 30 - Prob. 1RCCh. 30 - Prob. 2RCCh. 30 - Prob. 3RCCh. 30 - Prob. 4RCCh. 30 - Prob. 5RCCh. 30 - Prob. 6RCCh. 30 - Prob. 7RCCh. 30 - Prob. 8RCCh. 30 - The unicellular cyanobacterium Prochlorococcus sp....Ch. 30 - Prob. 2ALCh. 30 - It is well known that bacterivory (the consumption...Ch. 30 - Prob. 4AL
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- Why is it important that decomposers such as bacteria release nutrients?arrow_forwardWhich process allows water to enter the atmosphere? A) Transpiration B) Respiration C) Condensation D) Evaporationarrow_forwardWhy is it important to know how much is biodegradableand non-biodegradable?arrow_forward
- Which among A-D is not a step in the eutrophication process? A) O rapid growth of algae and cyanobacteria B) O influx of excess nutrients to an aquatic environment, particularly nitrogen and phosphorous C) O heterotrophic, aerobic respiration D) O eventual increase in the numbers of fish and other aquatic life due to the rise m oxygen concentration of the water E) OA-D are all a part of eutrophicationarrow_forwardGiven that the bottom of the ocean is anaerobic, what process in the nitrogen cycle is likely to be occurring in this location?arrow_forwardHow do cyanobacteria prevent erosion in cold desert regions?arrow_forward
- Which of the following is incorrect? a) Chemoheterotrophs obtain their energy from an organic compound b) Photoautotrophs obtain their carbon from an organic compound c) Both carbon and energy can be transferred from photoautotrophs to chemoheterotrophs d) Chemoheterotrophs are found in higher trophic levels of a food chain e) Photoautotrophs are considered primary producersarrow_forwardWhat are persistent organic pollutants (РОPS)?arrow_forwardWhich of these are known to host chemosynthetic communities? a) Hydrothermal vent O b) Hydrocarbon seep c) Hypersaline seep d) All of the above.arrow_forward
- What result can a river with an inflow of domestic sewage rich in organic waste can give?arrow_forwardRegarding nitrogen fixation, are the following statements True or False? a) Atmospheric nitrogen is reduced to the biologically useful form NH3 (or NH4 ). b) Nitrogen fixation in nature and in the lab requires a metal cofactor or catalyst. c) The availability of fixed nitrogen limits biological productivity. d) Ammonium from the atmosphere is fixed to more usable forms of nitrogen, such as nitrite (NO2–). e) Nitrogen fixation is energetically neutral, using a negligible amount of ATP. f) The enzyme nitrogenase, which takes part in nitrogen fixation, is inactivated by oxygen.arrow_forward47)Which process is only carried out by prokaryotes eutrophication weathering of phosphate rich rocks biological nitrogen fixation primary production carbon fixationarrow_forward
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