Here is an interesting and complicated example. Many fruits give off ethylene gas as they ripen; a lot of people put their tomatoes in paper or plastic bags to make them ripen faster. That's why putting fruit is a fridge is so silly, the ethylene builds up inside the sealed box and the fruit goes rotten faster. But some vegetables react differently to ethylene; with potatoes and onions, it suppresses the sprouting process. Put a banana in a plastic bag with a potato and the banana will be rotten in no time, but the potato won't sprout. Jihyun Ryou's response:
Apples emit a lot of ethylene gas. It has the effect of speeding up the ripening process of fruits and vegetables kept together with apples. When combined with potatoes, apples prevent them from sprouting.


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