cathiprofastde469 cathiprofastde469
  • 20-12-2022
  • Biology
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when a fish-eating bird contain 50 ppm of ddt, large fish contain 2 ppm, plant-eating fish contain 0.5 ppm, algae contain 0.04 ppm and the water contains 0.0005 ppm, what is this an example of?

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