One Bad Apple Spoils the Bunch
Jimmy Poon / Flickr, Tiny Fox Lab

Due to the way a rotting apple releases ethylene (which accelerates rotting), one bad apple really does ruin the whole bunch.Tiny Fox Lab Facts

Preview photo credit: Jimmy Poon / Flickr
Source: https://sites.psu.edu/siowfa14/2014/09/16/can-one-rotten-apple-really-spoil-the-whole-bunch/