In an aquatic ecosystem, the phenomenon of biomagnification can best be studied in the case of _________.
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A.
phosphates
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B.
chlorine
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C.
organochlorine
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D.
DDT
Correct Answer:
D. DDT
Explanation:
The correct answer is DDT. Biomagnification refers to the process where the concentration of a persistent toxin increases as it moves up the food chain. In aquatic environments, DDT is a classic example of this phenomenon because it is fat-soluble and does not break down easily. When small organisms like zooplankton ingest DDT from the water, it stays in their tissues. As larger fish eat these organisms, and then birds or humans eat those fish, the concentration of DDT significantly intensifies at each higher trophic level. This often leads to severe reproductive and health issues in top predators, making it one of the most well-documented cases of ecological biomagnification.
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