Answer:
The answer is location.
Explanation:
The answer is very logical and need no explaination.
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The best and most correct answer among the choices provided by your question is the fourth choice or letter D.
The cell would lose structure and shape when the ribosomes of a cell were damaged and stopped functioning.
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The correct answer is False. The correct word is Epidemic and not resistance. 
An abrupt decrease in a host immunity of a pathogen or newly emerging novel pathogen that is found in the endemic equilibrium with the exceeded transmission threshold is where an epidemic occurs. 
        
             
        
        
        
The answer to the question is A
        
                    
             
        
        
        
Answer:
(d). B-cells.
Explanation:
Adaptive immunity can be described as immunity which develops in response to exposure to a pathogen (or foreign molecule). throughout the life. It is divided into two types, humoral immunity and cell-mediated immunity. 
Humoral immunity is mediated by B cells that secrete antibodies against particular antigens. These antibodies recognize and neutralize the antigens and activate cell-mediated immunity, which is mediated by T cells.  
Thus, the correct answer is option (d).