Red and dry skin. (I'm a Nursing major)
        
             
        
        
        
The hypothesis is what you think before you get your result so observations can  influence your hypothesis
        
             
        
        
        
A double helix is <span>a pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule. or in other words a double spiral.</span>
        
                    
             
        
        
        
Answer:
The red balls here refers to the hydrogen and black balls refers to carbon.