After the power stroke, ADP is released<span>; however, the cross-bridge formed is still in place, and actin and myosin are bound together. </span>ATP can<span> then attach to myosin, which allows the cross-bridge cycle to start again and further </span>muscle contraction can occur<span> </span>
        
             
        
        
        
I think the right answer is b
        
             
        
        
        
The lithosphere sits on top of the asthenosphere.
        
                    
             
        
        
        
Preserves animal tracks are called trace.