Answer:
B.
Explanation:
Because a Longitudinal wave is a wave vibrating in the direction of propagation.
 
        
                    
             
        
        
        
It would be x and y chromosomes 
        
             
        
        
        
Answer:
Viruses do, however, show some characteristics of living things. They are made of proteins and glycoproteins like cells are. They contain genetic information needed to produce more viruses in the form of DNA or RNA. They evolve to adapt to their hosts.Living characteristics of viruses include the ability to reproduce – but only in living host cells – and the ability to mutate.
 
        
             
        
        
        
We identify them by their chromosomes.
If you are male, they have an XY pair. If you are an female, they have an XX pair.