high-concentration layer
91Fovea centralis — Schematic diagram of the human eye, with the fovea at the bottom. It shows a horizontal section through the right eye Latin fovea centra …
92Terra preta — (“dark soil” in Portuguese) refers to expanses of very dark, fertile anthropogenic soils found in the Amazon Basin. It owes its name to its very high charcoal content. It is also known as “Amazonian dark earth” or “Indian black earth”. In… …
93Photosynthesis — Composite image showing the global distribution of photosynthesis, including both oceanic phytoplankton and vegetation …
94Respiratory system — See also: Respiratory tract Respiratory A complete, schematic view of the human respiratory system with their parts and functions. Latin …
95Chicxulub crater — Imaging from NASA s Shuttle Radar Topography Mission STS 99 reveals part of the 180 kilometer (112 mi) diameter ring of the crater; clustered around the crater s trough are numerous sinkholes, suggesting a prehistoric oceanic basin in… …
96dinosaur — /duy neuh sawr /, n. 1. any chiefly terrestrial, herbivorous or carnivorous reptile of the extinct orders Saurischia and Ornithischia, from the Mesozoic Era, certain species of which are the largest known land animals. 2. something that is… …
97Platelet — Platelets, or thrombocytes, are small cytoplasmic bodies derived from cells. They circulate in the blood of mammals and are involved in hemostasis leading to the formation of blood clots. Like red blood cells, platelets have no nucleus. If the… …
98Auxin — Auxins are a class of plant growth substance (often called phytohormone or plant hormone). Auxins play an essential role in coordination of many growth and behavioral processes in the plant life cycle.OverviewAuxins derive their name from the… …
99Cider — This article is about the alcoholic beverage. For the non alcoholic beverage, see Apple cider. For software, see TransGaming Technologies. Cider in a pint glass Cider or cyder (pronounced /ˈsaɪdər/ …
100Human chorionic gonadotropin — chorionic gonadotropin, alpha polypeptide Identifiers Symbol CGA Alt. symbols FSHA, GPHa, GPHA1, HCG, LHA, TSHA …
