It could work, they would evolve over billions of years, and with a simple version of DNA, different stuff could be possible, such as pseudo-hibernation, where they could consume food and reproduce.
If it had a different atomic makeup, it could change the lifespan.
Not necessarily, they could evolve that just in case or maybe even if need it more.
@Nigel how is it impossible? It would be easier as it would allow them to evolve and better suit their new environment with gravity and atmosphere and other new stuff.