Answer:
Cell Bacteria Virus
Explanation: 
Assuming it means Eukaryotic cells, they are larger than bacteria. Viruses are smaller than bacteria. 
 
        
             
        
        
        
Bestie provide some answers
        
             
        
        
        
The maximum density is 4 degrees Celsius :)
        
             
        
        
        
Multiple things cause the migration of people.
Economic issues arise:
People run out of jobs and opportunities 
(BIGGEST REASON)
Cultural reasons:
Forced intentional migration had occurred in the past on accounts of slavery and political instability 
Safety:
More popular reason now is because of war or fights with other countries, the people want to keep their family safe so they move them or move with them
Hope this helped
        
             
        
        
        
Answer:
A. ribosomes
Explanation:
Every thing is in a science text book.