Answer:
The regulation of an internal environment is called homeostasis.
Explanation:
Homeostasis is when you can maintain a stable inner environment.
 
        
                    
             
        
        
        
Hydrogen because it only has one valence electron I believe.
        
             
        
        
        
Gastrointestinal stromal tumor (GIST)
Stomach cancer can also be refers to as
gastric cancer, thus, stomach cancer develop from the inner lining of the
stomach. However, tumor produced by the gastric cancer is known as
gastrointestinal stromal tumor (GIST). Some of these tumor are non-cancerous while
other are cancerous and they can be found anywhere in the digestive tract.
 
        
             
        
        
        
It takes 27 days for the moon to orbit the earth
        
                    
             
        
        
        
<u>Answer</u>: 
1. Type of medium - the nutrient availability is one of the vital factors for the growth of a bacterial colony. Thus, the used growth medium will fulfill this requirement. 
2. Incubation temperature - all bacteria have an optimal temperature range in which maximum growth is achieved. Any variations from this will result in negative effects on the amount of bacteria that are produced. 
3. Moisture - bacteria thrive in moist or wet environments. Thus, the availability of moisture is another vital factor for the growth of the colony.