Answer: These changes can be caused by environmental factors such as ultraviolet radiation from the sun, or can occur if an error is made as DNA copies itself during cell division. Acquired mutations in somatic cells (cells other than sperm and egg cells) cannot be passed to the next generation.
Hope that helped 
 
        
                    
             
        
        
        
Answer:
C)	none of the species would survive	
Explanation:
clam  only goes down to a pH of 4.5
 
        
                    
             
        
        
        
<span>_polytechnic__________ refers to traits that are affected by many genes, and __mulitifractorial_________ refers to traits that are influenced by many factors.</span>
        
             
        
        
        
I would say pelagic isn't a zone of ponds and lakes. A pelagic zone is more a zone of the sea rather than ponds and lakes.
        
                    
             
        
        
        
Answer:
That enhances the sensitivity of cancerous tumor cells toward the applied radiation dose.
Explanation:
It is a known fact that tumor cells are very hard to treat so, to increase their sensitivity toward radiation, the body of the patient is treated with special kind of cytotoxic drugs that enhance the sensitivity or exposure of those cancerous cells toward radiation and made them vulnerable. These drugs are applied to modern approaches because of their extensive action toward tumor cells.