Adjective
maladapted (comparative more maladapted, superlative most maladapted)
Of any evolving or learning entity, not well adapted for its environment.
The dinosaur is for most people the epitome of extinctness, the prototype of an animal so maladapted to a changing environment that it dies out, leaving fossils but no descendants. Robert T. Bakker
Due to the elimination of the maladapted individuals in the past generation, this population contains more bacteria that have some resistance against the antibiotic. Source: Internet
Mutation–selection balance main Natural selection results in the reduction of genetic variation through the elimination of maladapted individuals and consequently of the mutations that caused the maladaptation. Source: Internet
This selective elimination of maladapted individuals from a population is natural selection. Source: Internet