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 specified how to amend the Constitution, showing that the Constitution could adapt to changing conditions with an understanding that such changes required deliberation. States or the federal government can propose a new amendment to the Constitution either through state conventions or a two-thirds majority vote in both the House and the Senate.