The soviet union was ruled by the secretary general and a committee of fifteen men called the kievs politburo villeins bolsheviks

The Soviet Union was ruled by the Secretary General and a committee of Fifteen men called the Politburo

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 !