According to this view, such an evolutionary adaptation would have been caused by environmental stresses.

In these terms evolutionary adaptation may occur most obviously through the natural selection of particular alleles.

Smaller beetles fare better in scramble competition for shelter, which could one day lead to the evolutionary adaptation of smaller beetle structures for survival purposes.

Comparative physiologists often study organisms that live in extreme environments (e.g., deserts) because they expect to find especially clear examples of evolutionary adaptation.

Flatfishes have been cited as dramatic examples of evolutionary adaptation.