Why Do Some Long-Stored Fruits Smell Like Wine?

Some fruits that contain plenty of sugar such as apricot, peach, grape, apple and pear, smell like wine if they are kept for quite a long time. Although these fruits have left the trees, they are still alive and need air. How- ever, as their skin is thick and coated with

something like wax, it is hard for the oxygen in the air to get into the fruits. This means the fruits have to find another way to get oxygen. So, when the temperature is high enough, the fruits turn their sugar into oxy-gen which creates alcohol-hence the smell of wine.