How might dark mater shage the formation of galaxies A. all galaxies are initally made of dark matter which then turns into normal matter after 1 bililon years E dark matter in black holes consume normal matier C the gravity of dark matter causes protogalactic clouds to contract; dark matter teqmains in laloes because it cannot radiate away its orbitat energy 0. dark madter produces winds that rum an elliptical galaxy into a spiral galaxy