PCBSPolychlorinated biphenyls (PCs) are toxic chemical compounds which

PCBSPolychlorinated biphenyls (PCs) are toxic chemical compounds which werebanned by the U.S. Congress in 1979. PCBs were used as additives in paints,cements, and PVC coatings, and more significantly, as coolants in electricalansformers. Their role as a cooling agent led to water pollution, and PCBwater contamination led to the presence of the toxin in tissues of aquaticorganisms. PCB removal is extremely difficult because it sticks to mostSurfaces. Once ingested by an organism, the chemical amasses in livingtissue. The continuous accumulation of PCBs causes pathogenic effects as itsconcentration increases up the food chain.mers. Their led to the Prely diftiAccording to the PCBs reading passage above and the diagram below, where isthe greatest concentration of PCBs found in a food chain?GEPCBAProducersBPrimary consumersCSecondary consumersDTertiary consumers

Answer»

tertiary consumer are concentrate by pcbs

producers of food chain