Answer:
Each time your heart beats, an electrical signal travels through the heart. An EKG can show if your heart is beating at a normal rate and strength. It also helps show the size and position of your heart's chambers. An abnormal EKG can be a sign of heart disease or damage.
 
        
             
        
        
        
Because the mouth breaks down the food and the stomach uses acid to break food down even more...
        
             
        
        
        
<span>It will have little impact in the long run. Muscular dystrophy tends to interfere with the formation of muscular tissue, specifically it causes problems with the manufacturing of proteins necessary to maintain muscular tissue. This procedure would mean a temporary improvement in the subjects condition, but does not seem to provide a true permanent solution. Repetitive stem cell therapy may be able to slow down the conditions progression though.</span>
        
                    
             
        
        
        
A sample is a random, unbiased selection out of a larger group. An independent variable is one that is changed as to see how it will affect the dependent variable in an experiment. 
Hope that helped.
        
             
        
        
        
Answer:
a steep temperature gradient in a body of water such as a lake, marked by a layer above and below which the water is at different temperatures.
Explanation:
Hope this helped if so please leave a rating! :)
THANKS