251. In a mountaenous terrain, rich biodiversity is found in areas located at

1. 1. Lower latitudes and higher altitudes

   
   
   

   2. Higher latitudes and lower altitudes

   
   
   

   3. Lower latitudes and lower altitudes

   
   
   

   4. Higher latitudes and higher altitudes

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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252. Read the two statements A and B
     Statement (A) : Diversity observed in the entire geographical area is called gamma diversity.
     Statement (B) : Biodiversity decreases from high altitude to low altitude Identify the correct choice from these given below :

1. 1. Statement A is Correct, B is wrong

   
   
   

   2. Statement B is Correct, A is wrong

   
   
   

   3. Both the statements A and B are correct

   
   
   

   4. Both the statements A and B are wrong.

   
   
   

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   NA

   Correct Option: A

   NA

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253. During the growth of a tomato plant from a seed, it increases considerably in biomass. Which of the following materials, obtained from the environment, are necessary for the growth and increase in biomass ?

1. 1. Carbon dioxide and water.

   
   
   

   2. Carbon dioxide, oxygen, and nitrogen.

   
   
   

   3. Water, nitrate, and methane.

   
   
   

   4. Water, carbon dioxide, and mineral salts.

   
   
   

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   NA

   Correct Option: D

   NA

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254. The 1987 Montreal Protocol was signed for which of the following reasons ?

1. 1. To phase out the use of CFC's, found to be causing depletion of the ozone layer

   
   
   

   2. To ban nuclear testing in tropical oceans

   
   
   

   3. To begin converting from fossil fuel use to more renewable energy sources to reduce the anthropogenic greenhouse effect

   
   
   

   4. To stop the global trade in products made from endangered tigers

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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255. Which of the following is not a major positive feedback mechanism in which the activity of humans to increase global climate temperatures leads to an even further increase ?

1. 1. Tropical deforestation cause warming and drying so that remaining forests begin to decline

   
   
   

   2. Global warming causes snow to melt in polar regions and therefore increases global albedo

   
   
   

   3. Global warming causes increased rainfall, plant growth and photosynthesis

   
   
   

   4. Global warming causes increased CO₂ release from biomass decomposition

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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