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(b) An analysis of dichlorodiphenyltrichloroethane (DDT) content in a food chain for an ecological system is given below: Types of samples DDT concentration (mg kg:')

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(b) An analysis of dichlorodiphenyltrichloroethane (DDT) content in a food chain for an ecological system is given below: Types of samples DDT concentration (mg kg:') Water 0.00005 Plankton 0.04 Minnows 0.2 - 0.9 1.3 -2.0 Predatory Fish Predatory Bird Duck 6.0 22.8 Interpret these results. (4 marks)

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