What was one of the positive effects of westward expansion?

Expanding westward made it so they could get more land and achieve good sources of food for their people.

Hi! after fertilization occurs, the zygote goes through mitosis and then differentiation (aka specialization of cells) to have a variety of cells that perform different functions. this allows for the creation of tissues and so on, all of which were once stem cells with no specific function.i hope i !