Describe one way the presidentsidential election's have changed over time

In the beginning presidents were allowed to run for as many terms until the 22nd amendment was passed that allowed the president only 2 terms.

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 !