Fruit trees evolve from a seed or bulb, to a growing tree, and then to a full grown tree that bears fruit. Though the tree has changed, it still has the same DNA. When a frog finaly transforms from a swimming tadpole, its appearance and abilities are vastly different, but it's genes have not changed. Let's dive in, to understand if this process is more similar to what the Biblical authors meant by the “old and new covenants”.