Answer:
A. Skin color, a polygenetic trait, is also determined by environmental factors. 
Explanation:
When you are a lifegaurd you are outside much more which means you are very likely to get a tan; Therefore changing the pigment of Pat's skin.
I hope this helps you :) Have a nice day!
 
        
                    
             
        
        
        
The answer are the hands and feet.  It is the continuously changes of the
characteristics of the body, most noticeable in height and weight.  The ages 13-15 and 17-18 the two major brain
growth spurts occur. In times of growth spurts the changes is visible during the
first year of puberty. 
 
        
             
        
        
        
Answer:
Their Cell walls
Explanation:
Bacteria has a cell made up of peptidoglycan
Archaebacteria has a cell wall made of various compounds)
Their rRNA is different, so different taht tehy are placed on different part of the evolutionary tree.