Answer:
mutualism
Explanation:
It's a symbiotic relationship beneficial to both symbionts. 
in this case E. Coli helps with the absorption of Vitamin K and other important vitamins for the human body in the colon. While, Human (host) provides shelter for it
 
        
             
        
        
        
I believe it will be 200,000 years
        
             
        
        
        
Answer:
on the outer surface of the red blood cell membrane 
 
        
             
        
        
        
<span>The answer would be: less; less
Repetitive Transcranial Magnetic Stimulation(</span>rTMS) and Electro Convulsion Therapy(ECT) are a treatment option for a patient with major depressions. Both of them is dangerous because it involves a stimulation of the brain and has a chance to do permanent damage afterward. rTMS is a newer method that has lower chance of side effect.
        
             
        
        
        
Abdominal relfex Arc . automatically region nervous system