Chapter 23: Problem 7
What is a trophic level? An ecological pyramid? (pages \(547-48\) )
Chapter 23: Problem 7
What is a trophic level? An ecological pyramid? (pages \(547-48\) )
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Get started for freeMatch each characteristic to the cycles listed in the key for questions \(23-26 .\) More than one answer can be used, and answers can be used more than once. Always involves the participation of decomposers
Match each human activity with one or more of the cycles listed in the key. More than one answer can be used, and answers can be used more than once. a. water cycle b. carbon cycle c. nitrogen cycle d. phosphorus cycle e. none of these f. all of these Take showers
Of the total amount of energy that passes from one trophic level to another, about \(10 \%\) is a. respired and becomes heat. b. passed out as feces or urine. c. stored as body tissue. d. recycled to autotrophs. e. All of these are correct.
How do nitrogen-fixing bacteria in the soil contribute to the nitrogen cycle? a. They return nitrogen to the atmosphere. b. They change ammonium to nitrate. c. They change nitrogen to ammonium. d. They withdraw nitrate from the soil. e. They decompose and return nitrogen to autotrophs.
Why are ecosystems dependent on a continual supply of solar energy? a. Carnivores have a greater biomass than producers. b. Decomposers process the greatest amount of energy in an ecosystem. c. Energy transformation results in a loss of usable energy to the environment. d. Energy cycles within and between ecosystems.
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