The lack of oxygen, poor/ bad bacteria smear, or difference in temperature that prevents optimal growth, within media.
 
        
             
        
        
        
Answer:
The virus integrates into long-lived immune system cells and remains dormant in those cells for many years.HIV's ability to hide its instructions inside of cells where drugs cannot reach it. 
 
        
             
        
        
        
Answer: C
Explanation: All of them could be correct, but I think this is the correct answer. I’m only in middle school, so if your not rushing you may as well wait for someone else.
  
        
                    
             
        
        
        
Answer: here´s why
Explanation: Underneath the frozen upper layer, the water remains in its liquid form and does not freeze. Also, oxygen is trapped beneath the layer of ice. As a result, fish and other aquatic animals find it possible to live comfortably in the frozen lakes and ponds. If water is heated, its volume gradually decreases.
 
        
             
        
        
        
Explanation:
On your own notebook paper write a four sentence summary of the most important ideas on each section 
what is Environmental science 
How do we study Environmental science