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biomagnification questions

Biomagnification 1. What is biomagnification? 2. What does it have to do with a food chain? 3. What happens if you eat certain foods that are high on the food chain? 4. What kinds of contaminants in food can occur by biomagnifications? . 5. What is the most amount of mercury allowable in fish according to the FDA? 6. Who is most at risk of mercury contamination? 7. What kinds of fish put you most at risk?