Answer:
 Option D and E
Explanation:
 
 Hope it was helpful for u
 
 
        
             
        
        
        
Answer:
C
Explanation:
The cell wall in only present in plant cells, not animal cells. Hence, the fact that plant cells are rectangular while animal cells are more circular. 
 
        
                    
             
        
        
        
Explanation: C.) DNA polymerase
 
        
             
        
        
        
Dissolving doe not indicate or guarantee a chemical change.  Most of the time it is a physical change.
Unchanged solid in a liquid does not even indicate any change.
Solid floating on top of liquid does not indicate any change, physical or chemical.
When a mixture creates a new compound (gas from mixing solid and liquid), there is a chemical change.