Grossology: Survival of the Grossest - Ep 17

It's science competition time at Ringworm Jr. High, only this time there's a new challenger for Ty's crown, Patrick, a kid with as much science knowledge as Ty himself. But when Ty decides to up his fruit-fly evolution project with a little mutagenic kickstart, things go wrong almost immediately. Now, he and Abby are up against terrorizing fruit flies that can breed and evolve so quickly that it seems like nothing can stop them. Unless Ty's willing to ask Patrick for a little help.
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