What is the head of states responsibility

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 !

These islands/chinampas then provided rich soil for crops with easy access to water. i hope this is correct, im so sorry if its not !