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.
In biology, adaptation has three related meanings. Firstly it is the dynamic evolutionary process that fits a population of organisms to their environment, enhancing their evolutionary fitness. Secondly, it is a state reached by the population during that process.