126. Assertion (A) : The boundary marking the termination of tree growth is known as the timber line.
     Reason (R) : Its location is determined by the amount of moisture, evaporation and depth of snow.
     Code

1. 1. Both (A) and (R) are true and (R) is the correct explanation of (A)
      

   
   
   

   2. Both (A) and (R) are true but (R) is not the correct explanation of (A)
      

   
   
   

   3. (A) is true but (R) is false
      

   
   
   

   4. (A) is false but (R) is true
      

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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127. Consider the following statements
     1. Chaparral biomes develop under conditions of high moisture with less pronounced differences in the temperature between summer and winter.
     2. Moist temperate coniferous forest biomes occur along the west coast of North America from central California to Alaska.
     Which of the statement (s) given above is / are correct ?

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: B

   NA

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128. Assertion (A) : Mangroves are very specialized forest ecosystems of the tropical and sub tropical regions bordering certain sea coast.
     Reason (R) : They stabilize the shoreline and act as bull work against encroachment by sea.
     Code

1. 1. Both (A) and (R) are true and (R) is the correct explains of (A)
      

   
   
   

   2. Both (A) and (R) are true but (R) is not the correct explain of (A)
      

   
   
   

   3. (A) is true but (R) is false
      

   
   
   

   4. (A) is false but (R) is true
      

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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129. Consider the following areas
     1. Orinoco basin in South America
     2. Zaire basin in Africa
     3. New Guinea
     4. Isthumus of Central America
     Which of the above said areas have tropical rain forests ?

1. 1. 1 and 3

   
   
   

   2. 1, 2 and 4

   
   
   

   3. 2, 3 and 4

   
   
   

   4. 1, 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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130. Which one of the following statements is not correct ?

1. 1. Make-up of the soil according to proportions of sand, silt and clay is known as soil texture
      

   
   
   

   2. The way in which sand, silt, clay and humus bond together to form peds is known as soil structure

   
   
   

   3. The soil moisture budget is the balance of water in the soil

   
   
   

   4. A group of soil formed different parent rocks and having different horizons and soil profiles is known as soil series

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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