Answer:
Gene therapy is a medical field which focuses on the utilization of the therapeutic delivery of nucleic acids into a patient's cells as a drug to treat disease.
 
        
                    
             
        
        
        
Hibernation is an adaptation that helps animals to survive cold winters.
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Answer:
The one major change that occurred was the placement and organization of the electron.
 
        
             
        
        
        
D. Ability to read
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