Yes just like a snake the shed their skin to grow like a outer shell
        
             
        
        
        
Answer:
Vertebrates are further classified according to several criteria like exoskeleton, respiratory organs, method of giving birth, number of chambers in heart, mode of living etc. They are further classified into classes Pisces, Amphibia, Reptilia, Aves and Mammals
 
        
             
        
        
        
Answer:
steroid family
Explanation:
Chemically, cholesterol is an organic compound belonging to the steroid family; its molecular formula is C27H46O.
 
        
             
        
        
        
<span>Ans : BbNn x bbnn - gives: 
In a ratio of 1;1:1:1 
BbNn - 1/4 black normal 
Bbnn - 1/4 black blind 
bbNn - 1/4 brown normal 
bbnn - 1/4 brown blind</span>
        
                    
             
        
        
        
I think the correct answer from the choices listed above is option b. A permeable rock weathers easily because it <span>contains many small, connected airspaces. Its porosity is very high that it can easily be destroyed by simple means. Hope this answers the question.</span>