Studies of populations that reveal correlations between dietary habits and disease incidence are epidemiological studies.
        
             
        
        
        
Aplastic anemia refers to a disorder that takes place when the body loses the tendency to generate enough amount of new blood cells. Aplastic anemia is a rare and serious disorder that can develop or arise at any age. In the condition, the person becomes fatigued and possess a greater threat of developing infections and uncontrolled bleeding.  
Thus, in the given case, the nurse should appoint a roommate who is free from any kind of infectious disease or any other thing, which can stimulate an infection.  
 
        
             
        
        
        
An atom of chlorine has several valence electrons in its
 
        
             
        
        
        
This is plant cell I got it from the safari hope it works and I think the other one is an animal cell try searching up the image and try looking the similar shape.