Separation of sister chromatids
        
             
        
        
        
I don't understand this but can u please help me with history
        
             
        
        
        
No because the type o blood is a universal type of blood
        
             
        
        
        
Answer:
C. Atomic Number
Explanation:
Atomic number, also known as proton number, never changes. Therefore it allows us to identify each atom.