Glutamic acid is a natural constituent of many fermented or aged foods, including soy sauce, fermented bean paste, and cheese, and is also a component of hydrolyzed protein such as yeast extract. The sodium salt of glutamic acid, monosodium glutamate (MSG), is a widely used additive in the food industry.
Paleontologistâs estimate that only a small percentage of the dinosaurs that ever lived have been or will be found as fossils, because their bodies simply decayed. The word fossil comes from the Latin word fossils, which means, âdug upâ. Most fossils are excavated from sedimentary rock layers. Sedimentary rock is rock that has formed from materials like sand, mud, and small pieces of rock. Over long periods of time, these small pieces of debris are squeezed and are buried under more and more layers of sediment that piles up on top of it.
1 mold fossils (a fossilized impression made in the substrate-a negative image of the organism). 2  cast fossils (formed when a mold is filled in). 3  trace fossils = ichnofossils (fossilized nests, gastroliths, burrows, footprints, etc.). 4  true form fossils (fossils of the actual animal or animal part).