It's a cell wall, common to some types of cells, like plant cells (one notable component of the cell wall is <span>cellulose, which is exactly where we obtain it from</span>).
        
                    
             
        
        
        
Answer:
34
Explanation:
it's atomic number is the same as it's number if protons
 
        
             
        
        
        
Parkinson's disease
<span>Parkinson's disease results from deterioration of brain's nerve cells</span>
        
                    
             
        
        
        
Physical is something you can have/ hold and mental is something in ur head that you can't see or hold.
        
             
        
        
        
Answer: Sex cell is the correct answer.