During a controlled experiment, a scientist will isolate and test (D) a single variable. A conclusion, nor a mass of information can be isolated or tested. A control group is the group that would receive a placebo, so testing that would be futile.
        
             
        
        
        
Which molecule is the primary energy currency of all cells ? Answer : ATP
        
             
        
        
        
Hello!
The answer is hydrothermal solutions.
Hope this helps!
        
                    
             
        
        
        
All fatty acids have the same proportion of hydrogen