Energy Flow in Ecosystems
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Questions and Answers

What percentage of energy is available to the next trophic level in an ecosystem?

  • 50%
  • 90%
  • 20%
  • 10% (correct)
  • What is the term for the percentage of useable energy transferred as biomass from one trophic level to the next?

  • Energy balance
  • Ecological efficiency (correct)
  • Assimilation efficiency
  • Production efficiency
  • What is the main driver of biogeochemical cycles?

  • The flow of energy (correct)
  • Ecological efficiency
  • Trophic levels
  • Living organisms
  • What is the term for the proportion of production at one trophic level that is eaten by the next trophic level?

    <p>Consumption efficiency</p> Signup and view all the answers

    What is the typical number of levels in a food chain?

    <p>3-5</p> Signup and view all the answers

    What is the term for the activities performed by living organisms?

    <p>Biological processes</p> Signup and view all the answers

    What type of organisms are responsible for producing most of the organic nutrients for the biosphere?

    <p>Photoautotrophs</p> Signup and view all the answers

    What is the primary source of energy for autotrophs?

    <p>An energy source, such as sunlight</p> Signup and view all the answers

    What is the term for the breakdown of dead organic matter by bacteria and fungi?

    <p>Decomposition</p> Signup and view all the answers

    Which type of organism feeds on dead remains of animals and plants?

    <p>Scavenger</p> Signup and view all the answers

    What is the term for the network of interconnected paths of energy flow in an ecosystem?

    <p>Food web</p> Signup and view all the answers

    Which type of organism is responsible for releasing nutrients back into the environment through the decomposition of organic matter?

    <p>Decomposer</p> Signup and view all the answers

    What is the main limitation of using ecological pyramids to explain energy flow in an ecosystem?

    <p>They oversimplify energy flow</p> Signup and view all the answers

    What happens to the chemical energy available at each higher trophic level due to heat loss?

    <p>It decreases by 90%</p> Signup and view all the answers

    What is the purpose of the 10% Rule in the context of energy supply and food chains?

    <p>To limit the length of food chains</p> Signup and view all the answers

    What is the net primary production of an ecosystem?

    <p>The amount of biomass produced minus the amount used by producers in cellular respiration</p> Signup and view all the answers

    What is the primary purpose of pyramids of energy?

    <p>To show the relative amount of energy available at each trophic level</p> Signup and view all the answers

    What is the main factor that sets the energy budget for ecosystems?

    <p>Primary production</p> Signup and view all the answers

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