Answer: The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress.
 
        
                    
             
        
        
        
Animals defend their territories because it’s kinda a instinct and they want to be in charge
        
                    
             
        
        
        
No, They find the alone one because they are easier to catch when away from the tribe. They are easier to kill when they are old and sick, or weak.
        
                    
             
        
        
        
<span>There are other avenues to find the cure to diseases that do not involve exploiting fetuses.
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