One is living and one insnt
        
             
        
        
        
To keep the body's internal environment in balance c) to make room for nutrients coming in d) to reduce unpleasant
        
                    
             
        
        
        
Answer:
b. Bacteria
Explanation:
Cell walls with lipopolysaccharide are present in gram Negative bacteria. Gram-negative bacteria have an outer membrane in their cell wall which is composed of lipopolysaccharides. 
The lipopolysaccharides are the molecules that have both lipids and proteins. The lipopolysaccharide layer that forms the outer membrane of Gram-negative bacteria is present outside to their thin peptidoglycan layer.  
 
        
             
        
        
        
Answer:
It can be things like bleach, soap, or vinegar. 
Explanation:
 
        
                    
             
        
        
        
20% is in the great lakes