I think you mean an apple will ripen bananas or green tomatoes. The apples as they ripen give off gas that aids and speeds up the ripening of other fruits, like placed in a brown bag with bananas or tomatoes and other fruits. Apples stored in the frige crisper drawer will make other fruits ripen quickly, thus go bad before you use them too.
The warmer it is , the faster they ripen
In a sense, they do. As bananas ripen, they give off heat and ethylene gas, which stimulates other bananas (and other fruit) to ripen.
I don't put my bananas in bags. Bananas will ripen with out a bag.
NO you cant they can ripen better if you leave them in the shade
You let them ripen on the plant, or some say sitting them with tomatoes or bananas help. You can eat them green of course, they just won't be as hot.
Tomatoes and apples give off ethylene (a gas) which will speed the decay of the other greens. This can be useful. If you put green bananas next to apples in a fruit bowl the bananas will ripen faster than if left on their own. In fact if you put tomatoes in a bag they will ripen faster than if left unenclosed as the ethylene is trapped in the bag. This effect was discovered by accident. Banana ripening sheds used to be heated by kerosene lamp type affairs. When modern heating was installed the fruit took longer to ripen. It was found that ethylene was produced as a by product of the burning kerosene and it was that which was speeding the ripening process.
u go bananas
Just let them grow. :)
Roma tomatoes typically require around 75 to 85 days to fully ripen.
For some reason, when bananas and other fruit (specifically apples) are settled together, the combination causes the bananas to ripen (and then OVER ripen) in a matter of a few hours. I am not sure why this is, just that it happens.
Bananas do not naturally ripen once plucked from the tree. Rather, commercially sold bananas are gassed with a special chemical that encourages ripening after they have already been harvested.
To ripen bananas faster, place them in a paper bag with an apple or a ripe banana. The ethylene gas released by the fruit will speed up the ripening process.