256. Which of the following is not one of the major environment problems resulting from human interference in the nitrogen cycle ?

1. 1. Eutrophication

   
   
   

   2. Nitrous oxide release increases global warming

   
   
   

   3. Increased acid rain

   
   
   

   4. Stratospheric ozone depletion

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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257. Which of the following affects biodiversity

1. 1. Climate change

   
   
   

   2. Ocean acidification

   
   
   

   3. Environmental pollution

   
   
   

   4. All of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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258. The Secretariat of the conventions on Biological Diversity, coordinating the International year of
     Biodiversity compaign was based in

1. 1. Italy

   
   
   

   2. London

   
   
   

   3. Toronto

   
   
   

   4. Montreal

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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259. Consider the following Statements :
     1. An increase in tropospheric oznoe concentration has a warming effect on earth
     2. A decrease in stratospheric ozone concentration has a cooling effect on earth
     Which of the above statements is/are true ?

1. 1. 1 only

   
   
   

   2. 2 only

   
   
   

   3. Both 1 and 2

   
   
   

   4. Neither 1 nor 2

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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260. Consider the following list of factors :
     1. Dispersal
     2. Rainfall
     3. Mineral deposits
     4. Competition
     5. Temperature
     Which of the factors listed above are most significant in determining the fact that belts of vegetation at successively higher latitudes ?

1. 1. 1 and 3

   
   
   

   2. 3 and 5

   
   
   

   3. 2 and 4

   
   
   

   4. 2 and 5

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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