How did martin luther challenge the catholic church?

Martin Luther wrote the 95 Thesis and posted it on the church's door. 

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 !

That president would be none other than president warren g harding , return to say of life before wwi