21. Match List - I (Major Biome) with List - II (Physical Characteristic) and the correct answer using the code given below the lists
    

    	List - I		List - II
    F.	The northernmost of the temations (i.e., continuous belt across North America and Northern Eurasia)	1.	FOristically poor
    G.	Arctic Tundra Vegeration	2.	Boreal Forest
    H.	Marine	3.	Pelagic division
    J.	The terrestrial biomes of the tropics	4.	Savanna woodland
    		5.	Soviet Steppe and North American Prairie

    Code :

    	F	G	H	J
    A.	2	4	3	1
    B.	2	1	3	4
    C.	4	3	5	2
    D.	4	1	3	2

1. 1. A.

   
   
   

   2. B.

   
   
   

   3. C.

   
   
   

   4. D.

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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22. Which of the following statements about Radioactive pollution are correct ?
    1. It causes hereditary change in the animals.
    2. It causes disbalance among different minerals in the soil.
    3. It hinders blood circulation.
    4. It causes carcinogenesis.
    Select the correct answer from the codes given below
    Code

1. 1. 1 and 2

   
   
   

   2. 1 and 4

   
   
   

   3. 1, 3 and 4

   
   
   

   4. 2, 3 and 4

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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23. The Minamata incident, an example for environmental degradation, is due to which one of the following ?

1. 1. Air pollution

   
   
   

   2. Nuclear disaster

   
   
   

   3. Water pollution

   
   
   

   4. Thermal pollution

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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24. Among the following environmental pollutants which one leads to the occurrence of acid rain ?

1. 1. Carbon dioxide

   
   
   

   2. Hydrogen peroxide

   
   
   

   3. Carbon monoxide

   
   
   

   4. Sulphur dioxide

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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25. Which one of the following is not required for the formation of photochemical smog ?

1. 1. Oxygen

   
   
   

   2. Oxide of nitrogen

   
   
   

   3. Carbon monoxide

   
   
   

   4. Sun light

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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