Answer:
subtitution mutation
Explanation:
The T in the middle is subtituted with C.
Hope it helps. 
 
        
                    
             
        
        
        
Your answer is gravitational forces
        
             
        
        
        
Answer: Two molecules of H2A
Explanation:
Structural organization of nucleosomes were determined by isolating them from unfolded chromatin and it has been found that the basic units of chromatin are the nucleosomes which consist of histone octamers of two molecule each of histone H2A and other histone molecules like H2B, H3 and H4. The histones are wrapped around with 147bp of DNA in almost two (2) turns.
 
        
             
        
        
        
Answer:
Carbohydrate
Explanation:
Cellulose is a type of carbohydrate