I would have to say A. ribosomes are known to break and release their digestive juices into the cell upon cell death. thus killing them
        
             
        
        
        
D. Plant cells lack a cell membrane
        
                    
             
        
        
        
The answer is A//////////
        
             
        
        
        
Answer:
Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor.
Explanation:
 
        
             
        
        
        
It has enhanced our knowledge in the science world greatly. Many cell organelles and chemical processes can be studied in more detail using the electron microscope.