The phrase "morphological evolution" refers to the process of how living things have adapted and changed in their physical structure over time. It focuses on studying the different forms and structures that species have developed. Full definition
Our data document rapid morphological evolution of island foxes (in ~ 2000 years or less). (journals.plos.org)
«They are an excellent model to understand how morphological evolution works, because mammoths are so closely related to living elephants, which have none of the traits they had.» (sciencedaily.com)
Trained in developmental genetics, Angela has worked on morphological evolution in the comparative plant model Cardamine hirsuta. (eiseverywhere.com)