161. Exchange of substances between individual cells and their environment takes place try

1. 1. Active transport

   
   
   

   2. Osmosis

   
   
   

   3. Diffusion

   
   
   

   4. All of the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: D

   N/A

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162. Prolonged water logging kills plant due to

1. 1. Stoppage of root respiration

   
   
   

   2. Dilution of soil nutrients

   
   
   

   3. Dilution of plant cell sap

   
   
   

   4. Leaching of nutrient

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

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163. The specific function of light energy in the process of photosynthesis to

1. 1. Active chlorophyll

   
   
   

   2. Split water

   
   
   

   3. Reduce carbon dioxide

   
   
   

   4. Synthesizes glucose

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

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164. Food is presereved at low temprature because

1. 1. Bacterial attack is minimised

   
   
   

   2. For easy cooking

   
   
   

   3. For easy digestion

   
   
   

   4. All the above

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: A

   N/A

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