Answer:
ARGON
hope this helps 
the element that is in the group 18 periodic 3 is argon 
 
        
                    
             
        
        
        
Answer:
The circulatory system, also known as the cardiovascular system, is a simple loop which starts, and ends, with your heart. It is a closed system, meaning blood does not enter or leave the system during its journey from your heart to your body and back again.
Explanation:
 
        
             
        
        
        
Well to begin with this process is called genetic engineering, the scientists altered the DNA of the chickens instead of altering a protein already in the chickens because when you alter the DNA the offsprings  of the chicken will will have the same qualities while if you only alter the protein already in that chicken only that chicken will be able to do the job 
        
             
        
        
        
Answer: A. Family size
Explanation:
I just got the shÎt wrong for you .
 
        
             
        
        
        
Answer:
Option C
Explanation:
A Mendelian trait is a dominant allele a offspring can receive from it's parents. Dimples or freckles are main examples of mendelian trait's because it's a dominant phenotype you can receive from your parents. Therefore the answer is option C or "humans can have dimples or not have dimples."
Hope this helps.