2 points Question 26 Energy in ecosystems a cycles from the sun to plants then

2 points question 26 energy in ecosystems a cycles

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2 points Question 26
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Energy in ecosystems: a. cycles from the sun to plants, then to animals, then back to the sun b. cycles from the sun to animals, then to decomposers
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c. travels only one way from the sun, to plants, then to animals d. increases as you pass from one trophic level to the next higher level
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e. is returned from decomposers to the soil, where it can be picked up by plants 2 points Question 27 A(n) ________ could exert the most influence to speed the reduction of greenhouse gas emissions.
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individual business owner
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nonprofit corporation policy maker 2 points Question 28
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All individuals of all species living within an area of interest represent a(n) ecosystem.
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community. population. trophic level.
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2 points Question 29 According to scientists, how do the levels of carbon dioxide in the atmosphere today compare to the past 400,000 years? There's more atmospheric carbon dioxide today.
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There's less atmospheric carbon dioxide today. There have been no changes in atmospheric carbon dioxide levels.
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Atmospheric carbon dioxide levels have fluctuated randomly. 2 points Question 30 Which of the following would most likely result in a population represented by an "inverted triangular" population pyramid, which is heaviest at the top?
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rapid population growth population stabilization
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a "boom and bust" cycle a population decline 2 points Question 31
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What are fossil fuels? carbon-rich remains of plants and microorganisms underground deposits of carbon dioxide
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accumulations of partially decomposed dinosaurs timber from old-growth forests 2 points
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Question 32 Human populations may surpass the carrying capacity of their environment due to temporary reliance on stored or nonrenewable resources.
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sudden population crashes. increases in death rates as the population growth approaches carrying capacity.
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decreases in birth rates as resources are depleted. 2 points Question 33 As the size of a population approaches the carrying capacity of its environment, which of following is true?
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the growth rate increases a graph of population growth resembles a "J" the population stabilizes at its maximum size
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birth rates become proportionally much greater than the death rates 2 points Question 34 Most of the energy contained in one trophic level is "lost" when it gets to the next trophic level. The lost energy takes the form of
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