How to Tell If an Apple Is Still Good to Eat? | livestrong
https://www.livestrong.com/article/554893-how-to-tell-if-an-apple-is-still-good-to-eat/
WEBOct 11, 2019 · For example, when you cut an apple, the chemicals in its flesh are exposed to the oxygen in the air, which promotes the formation of polyphenol oxidase, an enzyme that causes the fruit to turn brown. This process is called oxidation. Dangers of Mold on Apples. Microorganisms, such as fungi and mold, can affect apple shelf life, too.
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