A zoonosis (zoonotic disease or zoonoses -plural) is an infectious disease that is transmitted between species from animals to humans (or from humans to animals).
        
             
        
        
        
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because it helps the humans to understand more resharch 
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controlled variable
Explanation: i know this bc i just got it wrong lol
 
        
             
        
        
        
Bacteria reproduce exponentially, and at a brisk pace, meaning one bacterium becomes two, two become four, four become eight, and so on. Because of this, bacteria populations can double in four to twenty minutes, giving bacteria the ability to form millions of cells in as little as a few hours. Under the right conditions, a single bacterial cell can replicate into as many as one billion individual bacteria in just 10 hours.