Campbell Biology (11th Edition)
Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 55, Problem 7TYU

Which of the following would be considered an example of bioremediation?

  • (A) adding nitrogen-fixing microorganisms to a degraded ecosystem to increase nitrogen availability
  • (B) using a bulldozer to regrade a strip mine
  • (C) reconfiguring the channel of a river

    (D) adding seeds of a chromium-accumulating plant to soil contaminated by chromium

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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?
One of the lessons from a pyramid of production is that _____. A) eating grain-fed beef is an inefficient means of obtaining the energy trapped by photosynthesis B) the energy lost as heat or lost in cellular respiration is 10% of the available energy of each trophic level C) only one-half of the energy in one trophic level is passed on to the next level D) most of the energy from one trophic level is incorporated into the biomass of the next level E) production efficiency is highest for primary consumers

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Campbell Biology (11th Edition)

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6th Grade Science - Module 2: Physical & Chemical Properties; Author: iUniversity Prep;https://www.youtube.com/watch?v=4DONkU6c2Rs;License: Standard youtube license