BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 56, Problem 4U
Nitrogen is often a limiting nutrient in many ecosystems because
a. there is much less nitrogen in the atmosphere than carbon.
b. elemental nitrogen is very rapidly used by most organisms.
c. nitrogen availability is being reduced by pollution due to fertilizer use.
d. most organisms cannot use nitrogen in its elemental form.
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Matter is continually recycled between abiotic and biotic components of Earth's ecosystem in biogeochemical cycles. the various cycles differ from one another in several key aspects of their storage, conversion and modes of transport.
A. Describe the critical processes by which nitrogen is cycled through the biotic and abiotic components of earth’s atmosphere and identify the primary storage sink for nitrogen
Define the following terms: a. nitrogen fixation b. MoFe protein c. Fe protein d. nitrogen assimilation e. dead zone
Answer all the questions:
1. Organisms need nutrients in order to
A. utilize hydrogen and oxygen
B. recycle chemical compounds
C. carry out essential life functions
D. carry out nitrogen fixation
2. Biogeochemical cycling ensures that
A. human activity will have no effect on elements
B. living organisms will not become limited in any one nutrient
C. nutrients will be circulated throughout the biosphere
D. many nutrients will not reach toxic
3. Which of the following choices is benefit of human technology that positively impacts the environment?
A. ability to travel long distances
B. ability to make new products from used materials
C. capacity to produce large quantities of food
D. ability to live comfortable in large homes
Chapter 56 Solutions
BIOLOGY
Ch. 56.1 - Prob. 1LOCh. 56.1 - Prob. 2LOCh. 56.1 - Prob. 3LOCh. 56.2 - Describe the different trophic levels.Ch. 56.2 - Distinguish between energy and heat.Ch. 56.2 - Explain how energy moves through trophic levels.Ch. 56.3 - Explain the meaning of trophic cascade.Ch. 56.3 - Prob. 2LOCh. 56.4 - Define ecosystem stability.Ch. 56.4 - Prob. 2LO
Ch. 56.4 - Prob. 3LOCh. 56.5 - Prob. 1LOCh. 56.5 - Prob. 2LOCh. 56 - Prob. 1DACh. 56 - Prob. 2DACh. 56 - Prob. 3DACh. 56 - Prob. 4DACh. 56 - Prob. 1IQCh. 56 - Prob. 2IQCh. 56 - Prob. 3IQCh. 56 - Prob. 4IQCh. 56 - Prob. 5IQCh. 56 - Prob. 6IQCh. 56 - Prob. 7IQCh. 56 - Which of the statements about groundwater is NOT...Ch. 56 - Photosynthetic organisms a. fix carbon dioxide. b....Ch. 56 - Prob. 3UCh. 56 - Nitrogen is often a limiting nutrient in many...Ch. 56 - Prob. 5UCh. 56 - Prob. 6UCh. 56 - Inverted ecological pyramids of real systems...Ch. 56 - Prob. 8UCh. 56 - Prob. 9UCh. 56 - The equilibrium model of island biogeography...Ch. 56 - Based on results from studies at Hubbard Brook...Ch. 56 - According to the trophic cascade hypothesis, the...Ch. 56 - At Cedar Creek Natural History Area, experimental...Ch. 56 - Given that ectotherms do not utilize a large...Ch. 56 - Given that, in general, energy input is greatest...Ch. 56 - Prob. 3SCh. 56 - Explain several detailed ways in which increasing...
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- Define the following terms:a. nitrogen fixationb. nitrogenasec. nitrogen assimilationd. amino acid poole. nitrogen cyclearrow_forwardN2 content is kept constant in the biosphere due to: A. N2 fixation B. industrial pollution C. nitrogen cycle D. absorption of N2arrow_forwardWhich 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_forward
- Nitrogen is available to terrestrial plants in the form of Select all that apply. Select one or more: a. nitrite ions in the soil b. nitrate ions in the soil c. animal carcasses d. N2 in the atmosphere e. ammonium ions in the soilarrow_forwardA sizable amount of the nitrogen and phosphorus that enters the Chesapeake Bay originates from farms and other faraway sources, yet it is people living near the bay, such as oystermen and crabbers, who bear many of the negative impacts. Who do you believe should be responsible for addressing the problems posed by nutrient pollution? Should policies on this issuebe developed and enforced by state governments, the federal government,both, or neither? Explain the reasons for your answer.arrow_forwardAnswer the following: a. What is a nutrient cycle? b. What are the different types of nutrient cycles, and describe each briefly. c. What is the importance of the different nutrient cycles on Earth?arrow_forward
- 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_forwardAnswer the following questions: 1. Agricultural runoff is a major source of pesticide and excess nutrient pollution. This is a particular problem in Indiana. Why do you think more has not been done to control these contaminants? 2. How probable do you think that it is that laws will be enacted requiring automakers to pay o environmental damage due to cars, and that automobiles will be more costly in the future as a result? 3. Some people believe that nuclear power is necessary in order to deal with the climate crisis. How do you think the dangers from nuclear waste compare to the dangers from a destabilized climate? 4. Do you think businesses should be liable for damages from hazardous waste on its site, even if the pollution came from a previous owner? Who is responsible?arrow_forwardWhich of the following statements about the phosphorus cycle is correct? a. Phosphorus is fixed by plants and algae. b. Most phosphorus released from rocks is carried to the oceans by rivers. c. Animals cannot get their phosphorus from eating plants and algae. d. Fertilizer use has not affected the global phosphorus budget.arrow_forward
- The Philippines has long been facing different problems in the sector of agriculture. Cite two real-life scenarios/situations where you can see or observe the impacts of abiotic and biotic factors on crop production in the country (PH) . In what ways can you manage these factors to ensure agricultural productivity? (be as specific in giving abiotic/biotic stresses in real life example)arrow_forwardNitrogen availability is a limiting factor in crop production. * D. Disagree, because atmospheric nitrogen is about 80% and therefore nitrogen is readily available. A. Agree, because almost 80% of the atmospheric nitrogen (N2) is readily available. C. Agree, because atmospheric nitrogen must first be reduced to ammonia through N-fixation. B. Disagree, because only a small fraction of the atmosphere is composed of nitrogen gas.arrow_forwardWhich of the following is true about global food production? A. If we continue growing crops for biofuel production and agricultural feed, we will be able to feed billions more people. B. If we eliminated the production of grain-fed animals and maintained current yield and cropland, it is predicted that we could feed an additional 4,000 million people. C. Although poverty is linked to hunger, food production is the major cause of hunger. D. To increase food production, the only option is to increase the yield per area farmed.arrow_forward
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