Evolution by retaining juvenile traits as an adult is known as neoteny.

Still, Northern State retains traits from its unsigned indie days.

She may retain some residual memories and traits.

Paedomorphosis: a change in the genotype so the adults of a species retain traits previously seen only in juveniles.

As the last member of an ancient lineage, and one that retains several "primitive" traits, the goblin shark has been described as a "living fossil".

Therefore, Tzaganosuchus must retain several traits common to these groups, such as the long, pointed snout, amphibious lifestyle, and so on.

Although selective breeding has changed the appearance of many breeds, all dogs retain basic traits from their distant ancestors.

Many of them still retain cultural traits of their original homelands.

Neoteny is when adults retain traits or their juvenile form.

Many lapdogs are bred to retain puppy-like traits (neoteny) such as folded ears.