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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
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Which of the following features would be characteristic of the stratosphere but not of the troposphere?
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Correct option: A
Most ozone resides here
Option A (Most ozone resides here) is correct because the stratosphere contains the ozone layer, which absorbs UV radiation.
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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
(iii) The lake water turned green and stinky
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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