Why do fireflies glow

Use the following website to examine why fireflies glow (http://learn.genetics.utah.edu/content/begin/dna/firefly/). Be sure to discuss the process by which fireflies glow (chemical process: you have to play the simulation). Also include why fireflies glow (its not to create pretty lights for us to be astonished by either). Their are some interesting facts at the beginning of the page before you play the simulation. This is due Next Wednesday, Feb 15, 2012..