Binary fission is a type of asexual reproduction or rather an asexual reproduction common in most prokaryotes.
This function happens when the organism divides itself producing another replica of its genetic material and now altogether as the organism itself. 
Examples:
Bacteria
<span>archaebacteria</span>
        
                    
             
        
        
        
Answer:
ATP is responsible for contraction and relaxation in muscles and plays a major role in the muscular system of our body.