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:
Article Seven says that the new government under the Constitution would not start until conventions in at least nine states approved the Constitution. Amendments. Since 1787, Congress has written 33 amendments to change the Constitution, but the states have ratified only 27 of them. The first ten amendments are called the Bill of Rights. They were argued over during the Constitutional Convention of 1787, but it wasn't until 1791 that they were ratified by two-thirds of the states.