The normally treated group is called the control. Scientists use control to lessen the effects of variables. The accuracy of the results becomes higher. Control groups can be positive or negative depending on the expectation of a phenomenon that would occur in it.
        
             
        
        
        
Answer:
With an electron microscope
Explanation:
thats it 
 
        
             
        
        
        
The correct answer is B. Stomata
        
                    
             
        
        
        
Answer:
The natural resource distribution depends on many physical factors such as land, atmosphere, and altitude. Asset distribution is unequal because these factors differ on this planet from place to place.