New and Used American Eagle RVs For Sale. Current American Eagle inventory - find local, new and used listings from private RV owners and dealers. American Coach American Eagle (79)
Definition of evolve for English Language Learners. : to change or develop slowly often into a better, more complex, or more advanced state : to develop by a process of evolution.
Adaptation: From the Latin ad (toward) plus aptus (fit for some role); any structural, physiological, or behavioral trait that aids an organism's survival and ability to reproduce in its existing environment. Coadaptation: Mutual dependence between members of two species.