Brock Biology of Microorganisms (15th Edition)
15th Edition
ISBN: 9780134261928
Author: Michael T. Madigan, Kelly S. Bender, Daniel H. Buckley, W. Matthew Sattley, David A. Stahl
Publisher: PEARSON
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Chapter 21.6, Problem 1MQ
How does the formation of CaCO3 skeletons by calcareous phytoplankton retard CO2 uptake and help maintain ocean water pH?
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How would you expect the relative abundance of C3 versus C4 and CAM species to change in a geographic region whose climate becomes much hotter and drier, with no change in CO2 concentration?
Chapter 21 Solutions
Brock Biology of Microorganisms (15th Edition)
Ch. 21.1 - How is new organic matter made in nature?Ch. 21.1 - In what ways are oxygenic photosynthesis and...Ch. 21.1 - What is a methane hydrate?Ch. 21.1 - The oxygen and carbon cycles are interconnected...Ch. 21.2 - Why does Syntrophomonas need a partner organism in...Ch. 21.2 - Prob. 2MQCh. 21.2 - What is the final product of acetogenesis?Ch. 21.2 - Prob. 1CRCh. 21.3 - What is nitrogen fixation and why is it important...Ch. 21.3 - Prob. 2MQ
Ch. 21.3 - How does the compound nitrapyrin benefit both...Ch. 21.3 - The principal form of nitrogen on Earth is N2,...Ch. 21.4 - Is H2S a substrate or a product of the...Ch. 21.4 - Prob. 2MQCh. 21.4 - Prob. 3MQCh. 21.4 - Bacteria play major roles in both the oxidative...Ch. 21.5 - In what oxidation state is Fe in Fe(OH)3? In FeS?...Ch. 21.5 - Prob. 2MQCh. 21.5 - Why is excreted organic matter important to many...Ch. 21.5 - Prob. 1CRCh. 21.6 - How does the formation of CaCO3 skeletons by...Ch. 21.6 - Prob. 2MQCh. 21.6 - Prob. 1CRCh. 21.7 - What forms of mercury are most toxic to organisms?Ch. 21.7 - Prob. 2MQCh. 21.7 - Prob. 3MQCh. 21.7 - Prob. 1CRCh. 21.8 - What is the greenhouse effect and what causes it?Ch. 21.8 - What is the fate of most nitrogen used in...Ch. 21.8 - Why are the OMZs expanding and what are the likely...Ch. 21.8 - Prob. 1CRCh. 21 - Compare and contrast the carbon, sulfur, and...Ch. 21 - 14C-labeled cellulose is added to a vial...Ch. 21 - Prob. 3AQ
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- How is the phosphorous cycle different from the water, carbon and nitrogen cycles?.arrow_forwardWhy are phytoplankton, and not benthic algae or rooted aquatic plants, the dominant photosynthetic organisms of the oceanic pelagic zone?arrow_forwardIn habitats where water conservation is not especially necessary, is CAM metabolism more or less advantageous than C3 or C4 metabolism? Why?arrow_forward
- Although chemoautotrophs serve as the primary producers near hydrothermal vents, animals there still ultimately depend on the photosynthetic activities of plants and cyanobacteria. Why?arrow_forwardHow and in what way does an input of organicmatter, such as sewage, affect the oxygen content of ariver or stream?arrow_forwardWhat is marine snow? Why is it important in CO2 drawdown?arrow_forward
- The chemical representation of algae is C106H263O110N16P. The Gulf of Mexico contains 0.2 mg/L of nitrogen and 0.08 mg/L of phosphorus. a.Which is the limiting nutrient for algal growth in the water? Assume all other nutrients are abundant. b.What will be the mass of algae produced per liter of water (mg/L) in an algal bloom? c.If the nitrogen source is reduced by 50%, would the algae production also decrease by half? d.If the phosphorus source is reduced by 50%, would the algae production also decrease by half?arrow_forwardWhy can’t marine organisms use the nitrogen gas dissolved in seawater?arrow_forwardWhy might chemosynthetic communities exist only in places like the deep-ocean floor rather than across a wide range of land and sea habitats, the way photosynthesis-based communities are?arrow_forward
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