The sugar and phosphate portion of the nucleotides are found "<em><u>as segments of the rails</u></em>" on the DNA twisted ladder.
 
        
             
        
        
        
Rachel is a frail and fragile girl who is prone to injury and bruising William Sheldon would most likely have classified her body as a ectomorph.
William classified people according to their body into three types:  
1.	Endomorphs- rounded and soft, with comfortable and extroverted personality,
2.	Mesomorphs-square and muscular, with dynamic and aggressive personality,
3.	Ectomorphs-thin and fine-boned with introverted, and sensitive personality.
 
        
             
        
        
        
Answer:
The treatment of wastewater with microbes. 
Explanation:
It would be the best because Waste water management is the serious issue in today's world!