Apples

I was looking at an apple the other day and I wondered something I don't have the answer to.

Is an apple alive or dead?

Obviously, it's alive when it's on the tree. Does it die as soon as it's picked, or does it take a while? Or is it not dead at all? If it's alive, then consider that we're eating a still-living organism. What about leaves? We've all seen dead leaves. Of course, leaves don't die as soon as they are picked from a tree. Or do they?