Nucleus, The “brains” of the cell, the nucleus directs cell activities and contains genetic material called chromosomes made of DNA.
 
        
                    
             
        
        
        
Answer: the correct answers are A, C, and D.
Explanation:
if the water is in a lake then no ocean water can reach that lake.
 
        
             
        
        
        
It's biproducts or by cutting it open and find out.