Structural
BehaviouralPhysiological
On you there is your bipedalism, jaw and tooth structure, your opposable thumbs, eyes, ears, nose and that rather large to body size brain. These are just a few of your adaptions.
Structural and behavioral are just two types.
Creatures deep in caves that have lost skin pigmentation and eyesight.
DNA is a nucleic acid.
An enzyme is a protein with catalytic abilities.
Humans Overhunting of the Mammoths