Answer:
Variations are caused by mutation. random mating between organisms.
Explanation:
 
        
             
        
        
        
They stay in deeper warmer water and move allot and eat a lot of bait food 
        
                    
             
        
        
        
There's been a lot of bad news for polar bears recently. In 2007, for example, scientists reported that if global warming continues unabated, the population could drop two-thirds by 2050.
 
        
             
        
        
        
They are the skeletal muscle tissues
        
                    
             
        
        
        
To thank of the posabillatis