Oxygen definitely. Hope this helps.
        
                    
             
        
        
        
I will give you a website that has a chart on it
        
             
        
        
        
It has no nucleus and no membrane bound organelles
        
             
        
        
        
Answer: Differential 
Explanation:
The differential blood analysis provides information about the different components of the blood.
Analysis of blood is required in order to detect any disease. This test can detect the difference between the normal cell and abnormal cell.
The blood test can diagnose any type of disease like leukemia, any inflammation, cell shape, size and then compare it with normal cells of the body.
 
        
             
        
        
        
If the object doesn’t contain carbon. All living things contain carbon in some way. Except monoxide, dioxide, carbides, and carbonates