A unicellular or single celled organism is the term for organisms composed of only one cell.
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The answer to this question is 
B: the theory of evolution 
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The endoplasmic reticulum serves many general functions, including the folding of protein molecules in sacs called cisternae and the transport of synthesized proteins in vesicles to the Golgi apparatus.
        
             
        
        
        
Because not only is it illegal it damages your body which could cause lifelong problems