Answer:
Ability to move is the answer 
 
        
                    
             
        
        
        
The correct option is B.
Communication between cells can be inter communication or intra communication. Inter communication refers to a type of communication in which message is transfer from a near or distant cell to another cell, while the intra communication form of message transfer is one in which a message is been passed across within a single cell. 
In the option B above, a single cell is involved and that is an example of an intra communication. The other options are example of inter communication.
        
                    
             
        
        
        
Answer: metaphase
Explanation:
The failure of sister chromatids to separate during meiosis II occurs in metaphase stage. This is called as nondisjunction, this will affect the normal distribution of chromosomal material to the daughter cells. This will result in a problem called aneuploidy. There are abnormal number of chromosome per cell.