Answer:
The correct answer is <u><em>B. Cell Wall</em></u>
Explanation:
A <u><em>cell wall</em></u> is a rigid layer that is found outside the cell membrane and surrounds the cell. The cell wall contains not only cellulose and protein, but other polysaccharides as well. The cell wall provides structural support and protection. Pores in the cell wall allow water and nutrients to move into and out of the cell.
 
        
             
        
        
        
The purpose of the coenzymes NAD and FAD is to essentially carry hydrogen ions to the stage of cellular respiration called oxidative phosphorylation, I believe.
        
             
        
        
        
The answer to this is nutritional status.
The balance between nutrient intake and nutrient requirements is described as <u>nutritional status.</u> 
I hope I helped!!!
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There are 2 of them :-
1) Phagocytes
2) Macrophages.
These WBCs attach themselves to disease causing pathogens & then engulf them resulting in the destruction of the pathogens. 
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Hope it helps!
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