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 5 of the US Constitution describes how the Constitution may  be altered by proposing an amendment or amendments and subsequent  ratification. Thirty-three amendmentsâ¦ have been proposed and  twenty-seven of those have been ratified and are now part of the  Constitution.