Yes that would be genetic modification or stem cell research, such as the induced pluripotent stem cell that is completely man made. 
 
        
             
        
        
        
<span>Radon gas is a Groundwater entering a house through a home water-supply</span>
        
                    
             
        
        
        
The answer is “d” (1,000 kcal). As the trophic level increases energy is decreases by 10 times that of the previous level. If a system has 10,000 kcal, then the primary consumer have 10 times less (10,000/10) which is 1,000 kcal. The secondary consumers have 100 kcal and the tertiary have 10 kcal. Only 10% of the energy at each trophic level goes on to the next.
        
             
        
        
        
1 out of 5 is 1/5. 
Divide that and you get .20, which is 20%, so that is your answer, 20% fat.