This is all about dominant and recessive genes. According to the picture it looks like the yellow flowers have the dominant genes YY and the green flowers the recessive yy. You breeded the YY with the yy to get Yy.  Now you have a plant with the dominant and recessive gene. The green flowers are  recessive so if you breed 'y'  with anything you get yellow flowers whether they only have the'Y' gene or the both 'Y' and 'y'. 
 
        
             
        
        
        
Cell membranes help organisms maintain homeostasis by controlling what substances may enter or leave cells
        
             
        
        
        
Answer:
What is the question?? :}
Explanation:
 
        
             
        
        
        
Answer:
True
Explanation:
Please see the attachment
 
        
             
        
        
        
Answer:
A
Explanation:
Each enzyme operates best within a certain pH range.