biofilm A slime-enclosed community of bacterial colonies that is very difficult to eradicate even with the most powerful antibiotics or sterilizing systems. Biofilms can occur on any body surface, on teeth (as dental plaque), medical equipment, medical tubing, contact lenses and elsewhere.
Either Congress or the states can propose an amendment to the Constitution. 1  Both houses of Congress must propose the amendment with a two-thirds vote. This is how all current amendments have been offered. 2  Two-thirds of the state legislatures must call on Congress to hold a constitutional convention.
Article I of the Constitution established Congress, the collective legislative body made up of the Senate and the House. The primary function of these two bodies is to write, debate and pass bills and to send them on to the president for his approval or veto.