ummm...pretty much anything and everything has mitochondrias...or the main function of mitochondria is to make energy so maybe you can bring some sort of energy source and explain the connection...
Go to your class, and just start dancing. When you're done, tell people that the mitochondrias in your body gave you energy to move like that.
Then snap your fingers in a sassy way, blow the hair out of your eye, sit down, and just look forward and smile. You're guaranteed to get an A. You get my promise on that.