NSES Content Standard C Life Science: Regulation and behavior Grades 5-8, page 157 An organism's behavior evolves through adaptation to its environment. How a species moves, obtains food, reproduces, and responds to danger are based in the species' evolutionary history.

 
Benchmark 5F The Living Environment: Evolution of Life
Grades 6-8, page 124
Small differences between parents and offspring can accumulate (through selective breeding) in successive generations so that descendants are very different from their ancestors.

Benchmark 5F The Living Environment: Evolution of Life
Grades 6-8, page 124
Individual organisms with certain traits are more likely than others to survive and have offspring. Changes in environmental conditions can affect the survival of individual organisms and entire species.

Benchmark 5F The Living Environment: Evolution of Life
Grades 9-12, page 125
Heritable characteristics can be observed at molecular and whole-organism levels--in structure, chemistry, or behavior. These characteristics strongly influence what capabilities an organism will have and how it will react, and therefore influence how likely it is to survive and reproduce.