Muscle contraction that results in a change in joint angle is called <span>concentric contraction.
This contraction occurs when enough force that can overcome the resistance applied is developed by the muscle where this force developed is larger than the force of the resistance applied.</span>
        
             
        
        
        
A and D have a good day bye bye bye
        
                    
             
        
        
        
Answer:
cientists would use a control sample that has no DNA from bighead carp in Edna surveillance in order to verify that no DNA has contaminated the gel. It would eliminate certain errors in the experiment. What are some of the things that your DNA can be contaminated with?
Explanation:
 
        
             
        
        
        
If all nations agreed to reduce global warming then It would be good because the seals need icy conditions. So the less global warming then the more icy habitats there will be and the seals will have more places to live. 
Hope this helps
 
        
             
        
        
        
I would say that this is the cell wall because it provides strength and protection for the cell. The armor for Nights is protection for the person inside of the armor. Hope this helps!