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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
1
Medium
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Analyzing
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Identify a correct match from the following
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Correct option: D
More than one option is correct
Option D (More than one option is correct) is the correct answer because options B and C are both correct matches.
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A lake near a village suffered heavy mortality of fishes with in a few days. Consider the following reasons for this.
(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
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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