Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 46, Problem 38CTQ
Discuss how the human disruption of the carbon cycle has caused ocean acidification.
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Please select the correct sequence of steps involved in the creation of a dead zone in a water body.
1. Heterotrophic microbes metabolize the organic compounds synthesized by primary producers.
2. Water becomes hypoxic and toxic algal blooms may occur; animals in the area either flee or die.
3. Water accumulates nutrients as it runs through agricultural, industrial, and urbanized regions.
4. Dissolved O2 is consumed by metabolic activity of heterotrophs.
5. Excess nitrate and phosphate in nutrient-rich water causes algae and cyanobacteria to flourish.
A. 3; 5; 1; 4; 2
B. 3; 1; 4; 2; 5
C. 1; 3; 4; 2; 5
D. 5; 3; 4; 2; 1
E. 3; 5; 2; 1; 4
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Chapter 46 Solutions
Biology 2e
Ch. 46 - Figure 46.8 Why do you think the value for gross...Ch. 46 - Figure 46.10 Pyramids depicting the number of...Ch. 46 - Figure 46.17 Which of the following statements...Ch. 46 - The ability of an ecosystem to return to its...Ch. 46 - A re-created ecosystem in a laboratory environment...Ch. 46 - Decomposers are associated with which class of...Ch. 46 - The primary producers in an ocean grazing food web...Ch. 46 - What term describes the use of mathematical...Ch. 46 - The position of an organism along a food chain is...Ch. 46 - The loss of an apex consumer would impact which...
Ch. 46 - A food chain would be a better resource than a...Ch. 46 - The weight of living organisms in an ecosystem at...Ch. 46 - Which term describes the process whereby toxic...Ch. 46 - Organisms that can make their own food using...Ch. 46 - In the English Channel ecosystem, the number of...Ch. 46 - What law of chemistry determines how much energy...Ch. 46 - The mussels that live at the NW Eifuku volcano are...Ch. 46 - The movement of mineral nutrients through...Ch. 46 - Carbon is present in the atmosphere as ________...Ch. 46 - The majority of water found on Earth is: ice water...Ch. 46 - The average time a molecule spends in its...Ch. 46 - The process whereby oxygen is depleted by the...Ch. 46 - The process whereby nitrogen is brought into...Ch. 46 - Which of the following approaches would be the...Ch. 46 - How would loss of fungi in a forest effect...Ch. 46 - Compare and contrast food chains and food webs....Ch. 46 - Describe freshwater, ocean, and terrestrial...Ch. 46 - Compare grazing and detrital food webs. Why would...Ch. 46 - How does the microcosm modeling approach differ...Ch. 46 - How do conceptual and analytical models of...Ch. 46 - Compare the three types of ecological pyramids and...Ch. 46 - How does the amount of food a warm-blooded animal...Ch. 46 - A study uses an inverted pyramid to demonstrate...Ch. 46 - Describe what a pyramid of numbers would like if...Ch. 46 - Describe nitrogen fixation and why it is important...Ch. 46 - What are the factors that cause dead zones?...Ch. 46 - Why are drinking water supplies still a major...Ch. 46 - Discuss how the human disruption of the carbon...
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- Explain 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_forwardExplain the various anthropogenic causes of the water cycle.arrow_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_forward
- Figure 46.17 Which of the following statements about the nitrogen cycle is false? Ammonification converts organic nitrogenous matter from living organisms into ammonium (NH4+). Denitrification by bacteria converts nitrates (NO3-) to nitrogen gas (N2). Nitrification by bacteria converts nitrates (NO3) to nitrites (NO2-). 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_forwardWhy are drinking water supplies still a major concern for many countries?arrow_forward
- Propose a reason why the CO2 fluxes are greater for terrestrial biological activity than for marine biological activity.arrow_forwardYour friend's cottage is on a lake that has experienced numerous blooms of cyanobacteria (blue green algae) in recent years. Which chemical is most likely responsible for these blooms? methane phosphorus iron nitrogen carbon dioxide Previous PageNext Pagearrow_forwardWhich of these statements describes an accurate model for how carbon dioxide and oxygen levels change within the ocean over time? Choose two answers that apply. A) eutrophication of the ocean leads to an increase in dissolved oxygen. B) photosynthesis by the phytoplankton increase the oxygen concentration of the ocean. C) decomposition of dead organic matter decreases the oxygen concentration in the ocean. D) cellular respiration by primary consumers increases the oxygen concentration in the ocean E) anaerobic respiration at the ocean floor decreases the carbon dioxide levels in the oceanarrow_forward
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