blood type. Any of the four main types into which human blood is divided: A, B, AB, and O. Blood types are based on the presence or absence of certain substances, called antigens, on red blood cells.Also called blood group.lood type. Any of the four main types into which human blood is divided: A, B, AB, and O. Blood types are based on the presence or absence of certain substances, called antigens, on red blood cells.
Amendments are sent to the legislatures of the states by default. Only one amendment, the 21st, specified a convention. In any case, passage by the legislature or convention is by simple majority. The Constitution, then, spells out four paths for an amendment:
By Michael B. Rappaport and David A. Strauss. Article V of the Constitution says how the Constitution can be amendedâthat is, how provisions can be added to the text of the Constitution. The Constitution is not easy to amend: only twenty-seven amendments have been added to the Constitution since it was adopted. Article V spells out a few different ways in which the Constitution can be amended.