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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
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Which one among the following is likely to have the highest level of DDT deposition in its body?
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Correct option: B
Sea gull
Option B (Sea gull) is correct because DDT, being a persistent organic pollutant, biomagnifies up the food chain, resulting in the highest concentration in top predators like sea gulls.
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(i) Lost of urea and phosphate fertilizer were used in the crops in the vicinity
(ii) The area was sprayed with DDT by an aircraft
(iii) The lake water turned green and stinky
(iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis. Which of the following is not used for disinfection of drinking water? World most problematic aquatic weed is