Answer:
Ultrasound scan to rule out polyps or endometrial hyperplasia of the uterus
Explanation:
 
        
             
        
        
        
Answer:
Opportunistic.
Explanation:
Pathogen may be defined as the disease causing organism. The opportunistic pathogen causes disease mostly in the organism with weak immune system of the body.
The opportunistic pathogen can cause disease if the environmental condition is favorable for pathogen. These pathogens are not capable of inducing disease in the healthy individual.
Thus, the answer is opportunistic. 
 
        
             
        
        
        
The correct answer among the choices provided is option A. Lung capillaries are responsible for exchanging carbon dioxide for oxygen from the air. Blood that comes from the heart gets oxygen from the alveoli. The carbon dioxide in the blood goes into the alveoli at the same time.
        
                    
             
        
        
        
Explanation:
Most genes contain the information needed to make functional molecules called proteins. (A few genes produce regulatory molecules that help the cell assemble proteins)