Answer:
1. 50%
2. ½ for both Ww and ww
Explanation:
White wings: WW, Ww
Yellow wings: ww
Ww x ww
White wing: W w
Yellow wing: w Ww ww
 w Ww ww
 Phenotypic ratio: Ww: ½ ww: ½
Percentage of offspring with yellow wings is 50%
 
 
        
             
        
        
        
In order for multicellular organisms to maintain homeostasis B. their organ systems must work together. So the answer is letter B. This is because in order for the body to maintain hemostasis, it has to maintain the body temperaturw in any weather and climate it will experience.
        
                    
             
        
        
        
Hydrogen breath test 
Milk tolerance test 
Small bowel biopsy
Lactose tolerance test
        
             
        
        
        
I'm not sure how exactly you wanted this question to be answered. You're either talking about the symmetry where animals would have two legs or two arms for example and thus producing a pair of each muscle on both sides of the body, or you're refering to the development of agonistic and antaonistic muscles where each of them served a different purpose; either extending or contracting.