Absurd question: life on earth has adapted to some fairly harsh conditions, eg: micro-organisms in the mouths of active volcanoes etc. Might it be possible to genetically engineer life which was capable of withstanding the conditions of outer-space? With a view ultimately to creating human beings (however bizarre) capable of withstanding such conditions?
Re: Might it be possible to selectively breed life adapted to survival in space
Try the Evolution links in the MadSci Library for more information on Evolution.