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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
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Ozone saves the biosphere by absorbing the high energy radiation called
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Correct option: B
Ultraviolet rays (UV)
Option B (Ultraviolet rays (UV)) is correct because ozone absorbs harmful ultraviolet radiation from the sun, protecting the biosphere.
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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