Michael Levin has some awesome experiments where he screws around with the bioelectric fields of planetaria and he gets them to grow two heads and no tail, while being genetically identical to a normal one.
One of my old classmates' area of research is applying electric stimuli to various types of cells. Apparently the right amount at the right time can briefly allow foreign material to pass through the cell wall unimpeded. The complexity of a single cell is insane, that of a complex organism is way beyond insane.
I think you meant cell membrane rather than cell wall?
(There is a contrarian theory that says that the cell membrane does not exist at all, look up Gilbert Ling. So it's no surprise that things can move in and out of the cell under certain conditions.)
Planaria. (Yeah, I am a pedant sometimes.) Also, frogs, tadpoles, axolotls. Truly a wonderful mind. I admire him, not least for his ability to do really weird and important science outside the usual "don't do anything extraordinary" boundaries set by ossified grant committees.
