Increasing water vapor leads to warmer temperatures, which causes more water vapor to be absorbed into the air. Warming and water absorption increase in a spiraling cycle. Hope it helps!
        
             
        
        
        
DNA molecule was instrumental in the formulation of the modern cell theory.
        
             
        
        
        
Its found in the body's tissues. 
Hope that helps. I can give a more detailed answer if you need one. <span />
        
             
        
        
        
Answer:
Earth's atmosphere is roughly 78 percent nitrogen and 21 percent oxygen, with trace amounts of water, argon, carbon dioxide and other gases. Nowhere else in the solar system is there an atmosphere loaded with free oxygen, which is vital to one of the other unique features of Earth: life