Answer:
The Myelin Sheath allows neurons to speed up the transmission of nerve impulses.
 
        
             
        
        
        
1: incomplete inheritance
2: dominant, recessive 
3: polygenic inheritance
4: multiple alleles
        
                    
             
        
        
        
Force is mass × acceleration and it is measured in Newtons.
 Mass = 3kg
Acceleration = 9m/s²
F = ma
F = 3×9
F = 27Newtons.
        
             
        
        
        
Cell wall is the outer permeable covering in all pants and almost all prokaryotes ! cell wall are mainly made up of cellulose , sometime by chitin!!