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.
In the diet, protein sources are labeled according to how many of the essential amino acids they provide: â¢ A complete protein source is one that provides all of the essential amino acids. You may also hear these sources called high quality. proteins. Animal-based foods; for example, meat, poultry, fish, milk, eggs, and cheese are considered complete protein sources. â¢ An incomplete protein source is one that is low in one or more of the essential amino acids. Complementary proteins are two or more. incomplete protein sources that together provide adequate amounts of all the essential amino acids. â¢ Every function in the living cell depends on proteins.