A: The Allied Powers, or Allies, refers to coalitions of primarily North American nations victorious over rival, central-European forces in World War I and World War II. The four nations that recurred as the main forces of the Allied Powers in both wars were France, Russia/USSR, the United Kingdom and the United States. Continue Reading
The Phospholipid Bilayer. 1  All Biological Membranes are made of the same basic structure. 2  This is composed of molecules called Phospholipids, which form a Phospholipid Bilayer. 3  Phospholipids are fats. 4  They are composed of two Fatty Acid 'tails' and a Phosphate 'head' .
Figure 4.1 Fluid-mosaic model of plasma membrane structure. The membrane is composed of a phospholipid bilayer in which proteins are embedded. The hydrophilic heads of phospholipids are a part of the. outside surface and the inside surface of the membrane. The hydrophobic tails make up the interior of the membrane.