For you to understand the process we can say that the weak will die. If the animal or organism can't get food or find any it is naturally "selected" to die.So a Cuticle could have evolved like that. Hope tgis is useful 
        
             
        
        
        
Answer:
it may be erosion, I'm not quite sure but it could possibly be a form of erosion.
 
        
             
        
        
        
This is called Diffusion because the oxygen molecules are semiseperable
        
                    
             
        
        
        
Because he was a monk, not a scientist, and his work was not widely published.