Hair color, eye color, height, and even some disorders such as schizophrenia
 
        
             
        
        
        
The part of their eye , located behind the retina ,called the Tapetum lucidum. It is reflective and helps the cat with night vision based on how light passes through it
        
             
        
        
        
Enzymes create chemical reactions in the body. They actually speed up the rate of a chemical reaction to help support life. The enzymes in your body help to perform very important tasks
        
                    
             
        
        
        
Before cells could be seen by using a microscope, people believed that diseases were caused by spiritual effects.
        
                    
             
        
        
        
A theory is an idea that has yet to be proven by experimentation. A law is a theory that has been proven correct.