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15-05-2018
Biology

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Due to increasing concentrations of ddt as one moves up the food chain, cormorants and mergansers have about ______ times as much ddt residue as the background concentration in the water.

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andriansp andriansp

27-05-2018

Answer: 1 million

Toxins will be accumulated in the higher level pyramid, this phenomenon is called biomagnification. The rate of biomagnification from water to producer approximately 1000 times, while the rate for every level above producer around 10 times. Assuming the bird is a tertiary consumer, the rate would be 1000* 10^3= 10^6= 1 million times

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