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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
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Consider the following statements regarding deforestation I. It is removal, decrease or deterioration of forest cover of an area II. It leads to soil erosion III. Deforestation often causes flash floods IV. Deforested area can be used variously as cropland, industrial area, residential area, fallow land, etc. Which of the statements given above are correct?
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Correct option: D
I, II, III and IV
The correct answer is D (I, II, III and IV) because all the statements accurately describe the effects and consequences of deforestation.
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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
