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Question
Concentration of DDT (expressed as parts per million) are 0.04 ppm in zooplankton , 0.5 ppm in small fish , 2 ppm in large fish, and 25 ppm in osprey. This pattern ________.A) is an example of synergy
B) resembles the changes in available energy in a trophic pyramid
C) suggests that the numbers of ospreys will decline, which would restore ecosystem homeostasis
D) is not as bad as one would think at first glance, because the higher concentrations are in larger animals, so DDT content per kilogram of biomass does not increase as much as these numbers would suggest
E) should not be too alarming, because even the highest numbers are still too low to cause significant damage (at most they are 25 ppm).
Answer
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