I think early multicellular creatures heavily used fractals in their shapes, because they are simpler to encode in DNA (ie. it probably requires fewer instructions), thus making it likely that we could have an MP discount or something to have symmetrical parts to reflect that it is easier to code for that in DNA or something.
Cool thing abot that, is if you have fractal symetry you increase your surface rapidly, it could be useful in cells of leaves or lungs or any tissue that need rapid teansfer of resourses with enviroment, so it probably will be implemented simply by measurement of surface area of parts of body
Deathwake
(i nuked zenzone and will never let him forget it)
6
Lungs effectively are as close as possible to fractal symmetry already