Based on:Sutphin, G. L., Kaeberlein, M. Measuring Caenorhabditis elegans Life Span on SolidMedia. J. Vis. Exp. (27), e1152, doi:10.3791/1152 (2009).what are function of daf-2 in Caenorhabditis elegans?What environmental factors also affect worms’ lifespan? How could you testit?.