General
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Biology

Given figure represents bio magnifications of DDT in an aquatic food chain. Select the incorrect statement regarding this

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  1. Increased concentration of DDT in birds affects calcium metabolism due to which egg shells become thin and break before maturity.    
  2. River water may have a very low concentration of DDT, but the carnivorous fish in that river may contain high concentration of DDT, which is still suitable for consumption by human beings.    
  3. When agricultural fields are sprayed with DDT, it is carried by run off water into nearby aquatic bodies.    
  4. None of these.    

    Answer:The correct answer is: River water may have a very low concentration of DDT, but the carnivorous fish in that river may contain high concentration of DDT, which is still suitable for consumption by human beings.

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