The pomegranate fruit has been cultivated since ancient times, particularly in the Middle East and the Mediterranean. It has a hard outer rind, and inside are several chambers, each of which contains a multitude of seed pods, consisting of a single hard seed wrapped in a protective cushion of liquid.
Take every detail of that description, make it a bit smaller, a bit softer, and a whole lot more edible, and what you've got is the exact description of the tomato fruit. One could certainly be forgiven for assuming that they were genetically related, but if you look at the phylogeny of the two plants, you see that that hypothesis could hardly be more wrong--not to mention the minor little detail of tomatoes being native to the Americas, literally on the other side of the world from the pomegranate's home!
So what's going on here?