Alpine Tundra are found at the tops of tall mountains.
 
And it differs because the <span>Arctic refers to Northern latitudes, alpine refers mountainous regions.</span>
        
             
        
        
        
When researchers examine these damaged nerves, they find that the myelin insulation is often gone and the axons are destroyed. These changes prevent nerves from transmitting messages properly.
A
        
             
        
        
        
Neck length is what is going to change so that is the Independent Variable. The Dependent Variable is the Survival Rate. 
Hope this helps
 
        
                    
             
        
        
        
TRNA: transport/transfer rna