Answer:
The Doctrine of Specific Nerve Energies has been and continues to be enormously influential in the physiology, psychology, and philosophy of perception. In simple terms, the Doctrine states that we directly perceive in the first instance the activity of our nerves, rather than properties in the external world.
 
        
             
        
        
        
The Colorado potato beetle 
        
             
        
        
        
Metallic luster is your answer
        
             
        
        
        
The amino acid sequence of a protein which is referred to as its primary structure determines the structure or folding pattern of that protein