An
oak apple gall is pretty amazing. The image shows the inside of a gall which was cut open with an exacto knife. This gall is about one inch in diameter.
The wasp has developed chemicals which, when inserted into the oak leaf, hi-jacts the oak DNA to cause the oak to construct a womb for the wasp egg. A real-life
"invasion of the body snatchers"
Just as in a human womb, where the fetus obtains its energy via an umbilical connection to the wall of the womb, the wasp chemical causes the oak leaf to build a round ball and inside the ball are hundreds of fiber connections to the inside of the ball. All the fibers connect to the center of the ball and nourish the wasp egg.
If a wasp can make a tree be its womb, then cows can be made to produce spider web liquid, instead of milk (
which is being tried now )