Robots don't necessarily "grow" - they can't gain/lose mass through the acquisition/loss of energy.

Robots don't spontaneuosly mutate; subsequently, robots don't evolve. They don't contain genetic material which is capable of being inherited by off-spring.

Robots -independent of programming-, aren't "self-sophisticating".

Robots aren't endowed with reproductive organs, and don't contain the ability to produce life naturally; therefore, robots can't experience pregnancy.

Robots can't think beyond programming.

On the other hand, when organisms combine with robots, thats quite interesting. Scientists were able to culture mouse neurons on a robot; the robot was capable of learning and behaved similarly to that of a mouse.

If one were to further that effort and build a sort of "camera" on the robot and cultured hawk photoreceptors on the camera, this would be a "mouse-hawk hybrid". Thats the route neuroscience is headed, and that may likely afford humans a significantly extended life-span, if the process is able to be made more efficient - which it will.