In the case of genetic investigation, scientists used fruit flies as their model organism since they share 75% of the genes that cause disease with humans.  Fruit flies are also great to work in a research setting because they are relatively easy to take care of, especially compared to larger and more expensive organisms like rats or fish.Answer:
Explanation:
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C) it regulates what goes in and out of the cell 
Usually the membrane is the organelles that acts like a door. They decide what type of nutrients and molecules go into the cell.
        
                    
             
        
        
        
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