Campbell Biology: Concepts & Connections Plus Mastering Biology with Pearson eText - Access Card Package (9th Edition)
9th Edition
ISBN: 9780134240688
Author: Martha R. Taylor, Eric J. Simon, Jean L. Dickey, Kelly A. Hogan, Jane B. Reece
Publisher: PEARSON
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Chapter 37, Problem 7TYK
The open ocean and tropical rain forests contribute the most to Earth’s net primary production because
a. both have high rates of net primary production.
b. both cover huge surface areas of Earth.
c. nutrients cycle fastest in these two ecosystems.
d. the ocean covers a huge surface area and the tropical rain forest has a high rate of production.
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The total amount of energy taken up by producers through photosynthesis in an ecosystem is known as...?
Group of answer choices
a. evaporation
b. net primary production
c. standing crop
d. nutrient limitation
e. gross primary production
Nitrogen 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.
In the English Channel ecosystem, the number of primary producers is smaller than the number of primary consumers because________. a. the apex consumers have a low turnover rate b. the primary producers have a low turnover rate c. the primary producers have a high turnover rate d. the primary consumers have a high turnover rate
Chapter 37 Solutions
Campbell Biology: Concepts & Connections Plus Mastering Biology with Pearson eText - Access Card Package (9th Edition)
Ch. 37 - Fill in the blanks in the table below summarizing...Ch. 37 - Fill in the blanks in the table below summarizing...Ch. 37 - Which of the following groups is (are) absolutely...Ch. 37 - Prob. 4TYKCh. 37 - Prob. 5TYKCh. 37 - Prob. 6TYKCh. 37 - The open ocean and tropical rain forests...Ch. 37 - Prob. 8TYKCh. 37 - Prob. 9TYKCh. 37 - Prob. 10TYK
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- Chemical fertilizers: a. supplement carbon fixation by crops. b. cause eutrophication. c. provide additional nitrogen for crops. d. provide additional phosphorous for crops. e. Only b. c. and d.arrow_forwardGross primary productivity refers to the total a. energy used by the heterotrophs of the ecosystem in a given period of time b. energy captured initially by the producers c. quantity of solar energy reaching a given area of the ecosystem d. quantity of solar energy available to the ecosystem in a given period of time e. energy used by the producers for their growth and reproductionarrow_forwardForest trees have trunks, branches, and big roots, contributing to large amounts of total biomass. Grasslands have comparatively less biomass, but have a larger net primary production than that of forests. Why is this so? A. Less respiration is needed in the forest habitat B. More biomass is added in a grassland in the same time as that of forests C. The number of consumers within the forest is greater D. Solar energy is converted to chemical energy at a much higher rate in forestsarrow_forward
- Which of the following approaches would be the most effective way to reduce greenhouse carbon dioxide? a. Increase waste deposition into the deep ocean. b. Plant more environmentally-suitable plants. c. Increase use of fuel sources that do not produce carbon dioxide as a by-product. d. Decrease livestock agriculture.arrow_forwardWhich of the following statements BEST describes energy transfer in an ecosystem? A. If the primary producer has 175,000 kcal available, the secondary consumer will receive 17,500 kcal from the primary consumer. B. If the primary consumer has 175,000 kcal available, the secondary consumer will receive 17,500 kcal from the primary consumer. C. If the primary consumer has 175,000 kcal available, the tertiary consumer will receive 175 kcal from the secondary consumer. D. If the primary producer has 175,000 kcal available, the tertiary consumer will receive 17,500 kcal from the secondary consumer.arrow_forwardNet primary production per unit area is likely to be highest in which of the following ecosystems?a. grasslandsb. desertsc. temperate deciduous forestsd. tropical rain forestsarrow_forward
- 92% of the energy produced in the United States is from this source of energy. A. non-depletable B. non-renewable C. renewablearrow_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 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
- a. What factors cause energy to decrease with each trophic level?b. How is it possible for energy to be lost and the ecosystem to stillrun efficiently?c. Are the nutrients on the earth a renewable resource? Why or why not?arrow_forwardWhat is NOT true about organic farming? A. Organic regulations in the U.S. mainly stipulate what kinds of inputs can and cannot be used in food production and processing. B. Organic farmers depend on a price premium from organic food to remain profitable. C. Organic agriculture includes regulations for supporting farm workers’ rights. D. Sales of organic food have risen sharply over the past couple of decades E. Crop yields are often a little lower than in conventional farming.arrow_forwardModern day industrial agriculture: a. has had no impact on society. b.has increased our ability to obtain more food from the same area. c.has permanently improved soils, providing more food from less space. d. promotes reductions in use of pesticides and fertilizers e. has rapidly improved soils, allowing continuous conversion of new areas to croplandarrow_forward
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