Asteroids range in size from Ceres-the largest at about 950 kilometers (590 miles) in diameter and also identified as a dwarf planet-to bodies that are less than 1 kilometer (0.6 mile) across. The total mass of all the asteroids combined is less than that of Earth's Moon.
Only about one-third of the protein eaten around the world comes from animals raised for food. Much of the protein consumed around the world comes from vegetarian sources, including grains, legumes, nuts and seeds. Three grains -- wheat, maize and rice -- provide 60 percent of the world's energy, as well as a good percentage of the protein consumed.
Glucose is the principal sugar used by body cells and tissues. 1  It is, therefore, important to know the sources of this nutrient. It may come from carbohydrates or from noncarbohydrate sources. Following are the four primary sources of glucose: 2  From the digestion of dietary carbohydrate.