I was debating this question for the longest time and I came up with a conclusion.
No
        
             
        
        
        
no the front roll doesn’t
        
             
        
        
        
Answer:
They have the same concentration.
Explanation:
Isotonic, by definition, means that the two solutions are of equal concentration
 
        
             
        
        
        
Answer:
To store the cells DNA
Explanation:
Maintain it's integrity and facilitate it's transcription and replication
 
        
             
        
        
        
Answer: biological food contamination
Explanation: