Answer:
Mutations affect evolution by increasing genetic variation and the potential for individuals to differ.
 
        
                    
             
        
        
        
Answer:
the spreading of something more widely.
Explanation:
 
        
                    
             
        
        
        
Runoff in neighborhoods can be a problem because as the water runs it can collect pollutants such as oil, pesticides, bacteria, etc. These pollutants can end up in our drinking water or can run into our fishing supply and even our swimming water... I wouldn't want to be swimming or eating fish that was swimming in pesticides and bacteria. 
        
             
        
        
        
The offspring could receive either D or d.