What Dynasty In China Built The Great Wall Of China
What dynasty in china built the great wall of china
The Great Wall of China was built during the Qin Dynasty under Emperor Qin Shi Huang to defend invaders from the northern empire.
What Are The 3 Properties Of Cell Theroy
What are the 3 properties of cell theroy Membrane A cellular membrane, also called a plasma membrane, surrounds all cells. This membrane functions to give the cell shape, and to keep the internal components confined and separate from the extracellular fluid that surrounds all cells. Plasma membranes consist of lipids, fatty or wax-like substances, and proteins. The most common lipid found in membranes, known as phospholipids, contains a phosphate group connected with a glycerol group and two fatty acid chains. Phospholipids heads are hydrophilic—attracted to water, while the fatty acid tails are hydrophobic—not mixing with water, making the molecule amphiphilic, according to information found in "Biology" by John W. Kimball, Ph.D. The lipids form a bilayer, with the tails facing each other in order to accommodate the watery environment inside and outside the cell, and regulate the movement of water, nutrients and wastes into and out of the cell, as described by toxicol...
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