Answer:
True
Explanation:
crops and other important food sources are processes and put into cereals.
The answer is A. Appalachian Mountains
When American colonists headed west they crossed what will known today as the Appalachian Mountains.
Hopes this Helps u ;)
Population structure is defined by the organization of genetic variation and is driven by the combined effects of evolutionary processes that include recombination, mutation, genetic drift, demographic history, and natural selection.