[Ji ji]

Higher radiation level could lead to wider genetical modification on short evolutional times.

First idea on possible modifications: adaptation to different gravity. I think of free-fall adapted species.

Color. Living on worlds with different irradiation can lead to alternative defensive pigmentation.

Sight. Our sight is centerd on the main radiation of Sun star. Different stars have different peak radiation, that is different "white" wave lenght.

Reproduction. Overpopulation can lead to genetically enginereed societies, where there's a reproductive elite (queens) alongside sterile masses. (Bee or ant society).