7th chapter 10 Crossword
                  
                  
                  
                  
                  
                  
                  
                  
                  
                  
                  
                  
                  
 
 
Down: 1) a microscopic particle that invades a cell and often destroys it2) a membrane containing inactive cell material3) substance used to kill bacteria or slow the growth of bacteria Across: 4) the simple cell division in which one cell splits into two5) an organism on which a parasite lives6) the use of bacteria and other microorganisms to change pollutants in the soil and water into harmless chemicals7) bacteria that invade a host organism and obtain the food they need for growth and reproduction from the host's cell
 

 

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