Dependent reaction is the factor that is observed and measured
        
             
        
        
        
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Answer:
2. Depth 3. Number of bubbles
Explanation:
2. Depth 
3. Number of bubbles
 
        
             
        
        
        
Answer:
in order, blood vessels, capillary,artery,vein,cardiovascular system, ventricle, aorta, dont know 8 but nine is oxygen
Explanation:
 
        
             
        
        
        
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