An adult axolotl salamander ( Ambystoma mexicanum ) retains the juvenile characteristics of external gills and a tail fin. This is an example of what mechanism?

Name: An adult axolotl salamander ( Ambystoma mexicanum ) retains the juvenile characteristics of external gills and a tail fin. This is an example of what mechanism?
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Paedomorphosis is the retention of juvenile features in the adult stage, which is what occurs in axolotls as they retain their external gills and tail fin.

An Adult Axolotl Salamander ( Ambystoma Mexicanum ) Retains the Juvenile