B - The environment within the cell is stable.
Homeostasis is when your body works to maintain equilibrium (balance) so within a cell, the cell would be stable
 
        
                    
             
        
        
        
A) Active transport 
Osmosis - active transport - substances move from low to high concentration
        
             
        
        
        
Tar and other ingredients found in smoke act as carcinogens which can cause an uncontrolled growth of cells
        
             
        
        
        
Answer:
The answer is heterozygous