At the same time, carbon dioxide molecules diffuse rapidly out of the red blood cells<span>, down their concentration gradient, and into your lungs. When </span>water<span> molecules </span>move <span>freely </span>across a cell membrane<span>, the process is called OSMOSIS , which is just a special type of simple diffusion.</span>
        
             
        
        
        
Answer:
skin cells and muscles divide 
Explanation: common sense cse we grow 
 
        
             
        
        
        
D) DNA is found in chromosomes in the nucleus, while RNA can move around the cell.
        
                    
             
        
        
        
List three characteristics of living organisms