GlossaryAdapted
To change a behavior or body part, over millions of years, so that it is easier to live in a special place or situation.
The long, flat arms and legs of the sea turtle are a way that this animal has adapted to help it swim faster through the water.
https://upload.wikimedia.org/wikipedia/commons/e/e5/Green_turtle_swimming_over_coral_reefs_in_Kona.jpg