Answer:
The Retina
Explanation:
The photoreceptors lie at the back of the retina
 
        
             
        
        
        
Until it expires, or about 5-7 days after being made. 
        
             
        
        
        
Carnivore !! because carnivore means an animal that feeds on flesh!!!!!....your welcome :)
        
                    
             
        
        
        
I believe you are referring to Nucleic acids.