The Eds are making pizza, and they need to correctly measure the ingredients they put in the dough and the sauce. Eddy ignores Double D's measurement for yeast and has trouble kneading the dough. Although the yeast wouldn't grow until they baked the dough in the oven, this clip illustrates how fast yeast can grow.

This clip illustrates how yeast makes bread rise in a simple and fun way.

Lucy and Ethel bake bread but put too much yeast. This clip can be used as an introduction to teaching about microorganisms such as yeast. It illustrates just how fast yeast grows and the role it plays in baking.

The team creates a model of the virus causing an epidemic to better understand how it behaves and affects human cells. The novel virus changes continually, so it is difficult for them to create a vaccine.

Thrax holds an evil meeting in which he highlights his successes as a viruses. He illustrates that viruses can cause sickness and even be lethal. Jones, the white blood cell, asks if there is anything he can do to stop the virus, indicating that white blood cells (also known as leukocytes) protect the body from illness, disease, bacteria, and other foreign invaders.