Answer:
X and Y 
Explanation:
Females are usually XX and Males are Ususally XY. 
 
        
             
        
        
        
Answer:
Mollusks don't have legs, though some have flexible tentacles for sensing their environment or grabbing things. Most mollusk species grow a hard shell for protection, but their shell grows in only one or two pieces. It doesn't have joints like the exoskeletons of insects and crustaceans 
Explanation:
Answer from Go.ogle