Transport Across a Cell Membrane. The cell membrane is one of the great multi-taskers of biology. It provides structure for the cell, protects cytosolic contents from the environment, and allows cells to act as specialized units.
How to Amend the Constitution. Article V of the United States Constitution provides authority and instructions for amending the Constitution. Amendments can be proposed by Congress or by constitutional convention. Congress then decides how to ratify the amendment if approved by Congress or convention.
Article V explains the amendment process, which is different and more difficult than the process for making laws. When two-thirds of the Senate and two-thirds of the House of Representatives vote to change the Constitution, an amendment goes to the state legislatures for a vote.