What is the difference between tropic and nastic movements?
Answer
 
  
  
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      TROPIC MOVEMENTS  | 
    
      NASTIC MOVEMENTS  | 
   
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      1. Movement is due to stimulus and response is towards or away from the direction of the stimulus.  | 
    
      1. Movement is due to stimulus by the response is not towards or away from the stimulus.  | 
   
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      2. The movement is more or less permanent.  | 
    
      2. The movement is temporary and reversible.  | 
   
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      3. Usually observed in stem and roots  | 
    
      3. Usually observed in other parts like leaves, flowers etc.  | 
   
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      4. It is a result of unequal growth on either side of the stem or roots showing the movement  | 
    
      4.It is a result of change in the cell volume  |