Campbell Biology 11th Edition - Valuepack
Campbell Biology 11th Edition - Valuepack
11th Edition
ISBN: 9780134833545
Author: Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece Neil A. Campbell Lisa A. Urry
Publisher: PEARSON
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Chapter 56, Problem 4TYU

Which of the following is a consequence of biological magnification?

  1. (A) Toxic chemicals in the environment pose greater risk to top-level predators than to primary consumers.
  2. (B) Populations of top-level predators are generally smaller than populations of primary consumers.
  3. (G) The biomass of producers in an ecosystem is generally higher than the biomass of primary consumers.
  4. (D) Only a small portion of the energy captured by producers is transferred to consumers.
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a) Describe the relative numbers of producers, primary consumers, secondary consumers, and tertiary consumers expected in an ecosystem based on the food chain depicted below. b) Describe the shape that this pyramid of numbers would take. algae insect larvae yellow perch northern pike human c) If you were to include decomposers in the food chain above, where would you place them? Explain your answer.
A researcher measures the amount of mercury (a persistant toxic chemical) in the fish of a lake ecosystem.  The concentration of mercury is 10 times higher in the tertiary consumer fish species compared to the amount in the primary consumer fish species.  A) Explain this result using the term bioaccumulation and biomagnification.   B) If a bear eats mainly the tertiary consumer fish from this lake, how would you expect the mercury concentration in the bear to compare to the fish?
At which point in the trophic pyramid is the greatest arount (not percentage) of energy lost? A) Between the primary producers and the primary consumers B) Between the primary consumers and the secondary consumers C)Between the secondary consumers and the tertiary consumers D) Between the secondary consumers and the primary producers
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