Answer:
The term Hemichordata—from the Greek hemi, meaning “half,” and chorde, meaning “string,” thus, “half-chordate”—was first proposed because the buccal diverticulum, a tubular outgrowth from the mouth cavity forward into the proboscis, or “snout,” resembled a rudimentary notochord—the dorsal, o
Explanation:
can i get the crown please 
 
        
                    
             
        
        
        
It is sensors :) i hope this helped you :)
        
                    
             
        
        
        
Answer:
The phenotype really only depends on the parents phenotype. 
Explanation:
 
        
             
        
        
        
Answer:
Pick Hydrogen, but read below.
Explanation:
The blacks are Carbon. They have 4 connections. The left Carbon has 3 whites connected to it. It is not totally an exclusive answer, but the whites could be anything in Column 17 (F, Cl, Br, I) or Hydrogen. Likely it is hydrogen.