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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
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Which of the following is absent in polluted water?
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Correct option: C
Larva of stone fly
Option C (Larva of stone fly) is correct because stonefly larvae are highly sensitive to pollution and are typically absent in polluted water due to their need for high oxygen levels.
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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