How does sugar help preserve jams and jellies?

no,because i tried a project.salt and nothing with apple is winning

Jams are made from juice and pulp. Jellies are made from juice that the pulp has been strained from, so it is clear. Preserves are made from the whole fruit or crushed fruit so that they have...

Any environment that is high on sugar or salt content is less apt to be hospitable to anything but yeast. Bacteria fails to thrive in any environment where high sugar or salt content is a factor. In...

So the jam can stay fresh.

Jam is made with whole fruit that is cooked down to release the pectin. Jelly is made with fruit juice that pectin is added to. While many canner's of today use pectin in jam, it is not traditional....