I think its free nitrogen
        
             
        
        
        
<span>If you belong to the blood group 0, you have no A or B antigens on the surface of your red blood cells but you do have A and B antibodies in your blood plasma.</span>
        
             
        
        
        
Answer:
The correct option is C.
Explanation:
There are three modes of heat conduction, these are conduction, convection and radiation. Heat transfer by conduction usually involves the movement of heat through solid substances. For instance, in the scenario given in this question, the warm surface is the solid substance through which heat is passed to the insects' bodies. Thus, conduction requires direct contact.
 Heat transfer by convection method usually involves the movement of heat through liquids or gases while radiation can occur in vacuum.
 
        
             
        
        
        
Answer:
Replication 
It’s called this because when you make a copy of something like you print to copies of the same assignment you are replicating the worksheets. This is an example of the answer so replication is to make a copy of something or multiple copies.
Explanation:
 
        
             
        
        
        
Homeostasis is maintained by the respiratory system in two ways: gas exchange and regulation of blood pH. Gas exchange is performed by the lungs by eliminating carbon dioxide, a waste product given off by cellular respiration.