who wrote All legislative powers here in granted shall be vested in a
Congress of the United States, which shall consist of a
Senate and House of Representatives. The executive
power shall be vested in a President of the United States
of America.

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 !

Every statement this is because of the same law