Question

question 12
read the following scenario and answer the question(s) below.
mercury is a heavy metal that occurs naturally in minerals and rocks. release of mercury from natural sources has been relatively constant over time. however, anthropogenic release of mercury has increased significantly in recent years primarily due to increased fossil fuel mining and combustion. mercury that is released into the air eventually ends up in spills or surface water. once in water, microbes convert mercury into methyl mercury, which is absorbed quickly and concentrated in the tissues of predatory fish such as shark and swordfish. large fish typically concentrate more mercury than small fish. people who eat fish with high methyl mercury concentrations can show tremors, deafness, muscle dysfunction, and attention deficits. pregnant women and children are especially sensitive to methyl mercurys toxic effects. learning disabilities and developmental delays are common in children who have been exposed to significant levels of methyl mercury.
mercury is to methylmercury as ddt is to______.
dep
doe
pop
pcb
rbp

Explanation:

Mercury is converted to methylmercury. Similarly, DDT (dichlorodiphenyltrichloroethane) is converted to DDE (dichlorodiphenyldichloroethylene). DDE is a breakdown product of DDT. DDT is an insecticide and when it undergoes certain chemical reactions (such as dehydrochlorination), it forms DDE. This is similar to the conversion of mercury to a more toxic and bio - accumulative form (methylmercury). DOP is dopamine, POP is persistent organic pollutants (a general category, not a specific conversion product of DDT), PCB is polychlorinated biphenyls (a different class of chemicals), and RBP is retinol - binding protein (unrelated to DDT conversion).

Answer:

DDE