Answer: c.  Is spontaneous generation a valid explanation for maggots in meats?
Explanation:
 
        
             
        
        
        
Answer:
c 
Explanation:
a b and c are all signs of life but energy can be in objects not just life.
 
        
             
        
        
        
Gel electrophoresis is a technique used to separate DNA fragments according to their size. This is from Khan academy so I believe it is reliable.
 
        
                    
             
        
        
        
Answer:
Dry Mouth (Xerostomia)
Fungal Infection.
Gum Swelling (Gingival Overgrowth)
Inflammation of the Lining Inside of the Mouth (Mucositis)
Mouth Sores (Ulcers)
Taste Changes, Including Metallic Taste.
Tooth Decay.
Tooth Discoloration.