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CH 24 Review Questions

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
A set of guilds is referred to as   Community  
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All of the following are free-living, nitrogen-fixing bacteria except:   Rhizobium  
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Which of the following is not found in the atmosphere?   Phosphorus  
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Which of the following zones is present only in oceans?   Abyssal zone  
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Most marine microorganisms are present in the:   Littoral zone  
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Which of the follwing is a category A agent?   Bacillus anthracis  
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Category B agents include:   Vibrio cholerae  
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Which of the following is the fourth most abundant element in the universe?   Carbon  
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The process by which nitrate is reduced to nitrogen is called:   Denitrification  
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Eutrophication is a term used in the   Phosphorus cycle  
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A region or regions of the earth populated by living organisms is referred to as   biosphere  
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the physical location where organisms are found is called a   habitat  
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the conversion of Carbon Dioxide (CO2) to organic molecules is called   carbon fixation  
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Cholera is considered a category what disease?   B  
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Rhizobium is involved in which cycle   Nitrogen  
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Populations of mircoorganisms that perform linked metabolic activities   Guilds  
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Physical locations where organisms are found   Habitats  
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Regions of the earth populated by living organisms   Biospheres  
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Consists of the sediments at the bottom of a lake   Benthic zone  
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deeper water located below the limnetic zone   Profundal zone  
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upper layer of water away from the shore   limnetic zone  
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