Answer:
Transport of tidal waves and currents
 
        
                    
             
        
        
        
Answer:
Actin filaments return to their original positions (does not occur in muscle contraction, according to the sliding filament model).
Explanation:
 
        
             
        
        
        
I think the answer is 90%. According to the recent National institute of Health, Microbes in the human body estimates that 90% of the cells in human body are bacterial, fungal, or otherwise non-human. Despite the arguments that bacteria enjoys a commensal relationship with the humans hosts, only a fraction of the human microbia has been characterized. 
        
                    
             
        
        
        
The answer is Heredity! :)