Bananas turn brown when left outside after a while because certain chemicals in the fruit react with the oxygen in the air by destroying cells, creating that icky brown color.

Learn why apples, pears, bananas, potatoes, and other fruits and vegetables turn brown when they are cut or damaged. ... Why Do Cut Apples Pears Bananas and Potatoes Turn Brown?

From the time it starts out as a small plant, it is used to tropical sun. Its peel turns spotty and brown. Its flavour disappears. How can this happen? ... Ripely bananas © Bernd Jürgens - www.fotolia.de

When the bananas turn yellow with some brown spots, they are fully ripened, and these figures are completely reversed.

Purchasing: Yellow bananas are available year round. Other varieties may also be available in large supermarkets, but ethnic markets are the place to ... Take note that their skins will turn black.

Bananas start off growing downward, but then turn toward the light causing their tips to bend upward.

After bananas have ripened, store in the refrigerator to help slow down ripening. The skin will turn dark brown, but this does not damage the fruit inside.

His teacher has asked him to find out why bananas turn brown in the refrigerator more quickly than on the counter.

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From April 1985 "Drying Times" ... PRODUCE IS OVER-RIPE - bananas, pineapple, and tomatoes are particularily susceptible to this.