What did mary land louis leakey discover that affected our understanding of early hominids?

answer; ///the correct answer is,by introducing a merit system of nobility.

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.