What elements of the constitution have it work so well for over 200 years?

-it separated separation of powers
-it established checks and balances
-we can add amendments

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 !