Sorry Piso, read all three links and NONE OF THEM explain any of the questions I raised. They go on about an organ functioning even though it's not fully developed. I didn't ask about ANY organ I asked about VITAL ORGANS i.e. brain, heart, lungs, kidneys and what kept the animal alive while they were evolving them. You can't seriously be suggesting that a half formed, unbeating heart is going to keep someone alive nor can you be suggesting that half-formed, uninflated lungs will do the same. Back to the drawing board for you!!