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Starting at 0.003 ppb in water, DDT can reach what level in fish-eating birds?

A0.4 ppm
B2500 ppm
C25 ppm
D2.5 ppm
Answer & Solution
Correct answer: C. 25 ppm
1. Concentration rises at each trophic level. 2. Fish-eating birds may hold 25 ppm. 3. This is biomagnification. _Source: syllabus Biology, Chapter 16, Environmental Issues._
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