Two examples of radioisotopes that can be used are carbon-14 to determine the age of fossils. Second, we can use iodine-131 to treat thyroid disease.
 
        
             
        
        
        
The answer is C, the membrane is in charge of what enters and leaves the cell
        
                    
             
        
        
        
Answer:philis or esophagus 
Explanation: I donno one if the two