Cells -> Tissues -> Organs -> Organs systems -> Organisms
        
             
        
        
        
Answer: A. virus strains multiplied in cell cultures 
 
        
             
        
        
        
<span>ACL
A popular amongst the most well-known knee injuries is the Anterior Cruciate Ligament (ACL) sprain or tear. The ACL is tissue that associates the thighbone to the shinbone, at the knee. Most ACL wounds are often sport related.</span>
        
             
        
        
        
THE WORLD RESOURCES SIMULATION CENTER. ... The WRSC will provide global leaders from business, governments, education and NGOs a resource for cooperation and collaboration to make informed and sustainable choices for humanity as a whole in the shortest possible time.
 
        
             
        
        
        
Answer:
Plant cells have a large central vacuole, a cell wall, and chloroplasts while animal cells do not. 
Hope this helps!