The phase contrast microscope uses out-of-phase and in-phase light rays that produce contrast areas allowing scientists to detect even a minute number of protein molecules and focus on the minute internal structures of a particle.  
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Answer:natural active immunity
Explanation:lol it took too long
 
        
             
        
        
        
Answer:
the the animal chane doesnt get mixed up with other anmal 
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The compound eye and eye is built differently from the vertebrate eye 
        
                    
             
        
        
        
Answer:
 Genetic engineering can be used to move genes from the chromosomes of one organism into those of another.