1. The use of microorganism metabolism to remove pollutants such as oil spills in the water bodies is known as

1. 1. biomagnification

   
   
   

   2. bioremediation

   
   
   

   3. biomethanation

   
   
   

   4. bioreduction

   
   
   

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   bioremediation

   Correct Option: B

   bioremediation

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2. Which crop utilizes solar energy most efficiently?

1. 1. Potato

   
   
   

   2. Sugarcane

   
   
   

   3. Wheat

   
   
   

   4. Rice

   
   
   

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   Sugarcane

   Correct Option: B

   Sugarcane

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3. Which one of the following statements is correct?

1. 1. All the abiotic resources are non-renewable and all the biotic resources are renewable

   
   
   

   2. All the abiotic resources are non-renewable but some of the biotic resources are renewable

   
   
   

   3. Some of the abiotic resources are renewable but the biotic resources are renewable

   
   
   

   4. Some of the abiotic resources are renewable and some of the biotic resources are non-renewable

   
   
   

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   Some of the abiotic resources are renewable and some of the biotic resources are non-renewable

   Correct Option: D

   Some of the abiotic resources are renewable and some of the biotic resources are non-renewable

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4. In nitrogen Cycle, soil nitrates are transformed into free nitrogen by

1. 1. nitrifying bacteria

   
   
   

   2. denitrifying bacteria

   
   
   

   3. ammonifying bacteria

   
   
   

   4. Both (a) and (c)

   
   
   

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   denitrifying bacteria

   Correct Option: B

   denitrifying bacteria

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5. In dry regions, the leaf size of a tree becomes smaller. It is so to

1. 1. reduce metabolism

   
   
   

   2. reduce transpiration

   
   
   

   3. maintain natural growth

   
   
   

   4. protect plant from animals

   
   
   

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   reduce transpiration

   Correct Option: B

   reduce transpiration

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