discontinuous evolution
21Poaceae — ▪ plant family Introduction formerly called Gramineae grass family of monocotyledonous flowering plants, a division of the order Poales. The Poaceae are the world s single most important source of food. They rank among the top five… …
22Bach quadrangle — The Bach quadrangle encompasses the south polar part of Mercury poleward of latitude 65° S.Mariner 10 photographyAbout half of the region was beyond the terminator during the three Mariner 10 encounters and hence not visible. The entire mapped… …
23digestive system, invertebrate — ▪ anatomy Introduction any of the systems used by invertebrates for the process of digestion. Included are vacuolar and channel network systems, as well as more specialized saccular and tubular systems. Comparison of unicellular and… …
24Nobel Prizes — ▪ 2009 Introduction Prize for Peace The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… …
25Disruptive technology — Types of Innovation[1] Sustaining An innovation that does not affect existing markets. Evolutionary An innovation that improves a product in an existing market in ways that customers are expecting. (E.g., fuel injection) Revolutionary… …
26Holocene Epoch — formerly Recent Epoch Latest interval of the Earth s geologic history, dating from 10,000 years ago to the present. The younger of the two epochs that constitute the Quaternary Period, the Holocene follows the last glacial stage of the… …
27History of zoology (1859–1912) — This article considers the history of zoology in the years up to 1912, since the theory of evolution by natural selection proposed by Charles Darwin in 1859.Charles Darwin gave new direction to morphology and physiology, by uniting them in a… …
28Ćuk converter — Cuk redirects here. For the Idel Ural festival, see Çük. The Ćuk converter (pronounced Chook, sometimes incorrectly spelled Cuk, Čuk or Cúk) is a type of DC DC converter that has an output voltage magnitude that is either greater than or less… …
29GEOGRAPHICAL SURVEY — Names The name Ereẓ Israel (the Land of Israel) designates the land which, according to the Bible was promised as an inheritance to the Israelite tribes. In the course of time it came to be regarded first by the Jews and then also by the… …
30The Value of Science — is a book by the French mathematician, physicist, and philosopher Henri Poincaré. It was published in 1905. The book deals with questions in the philosophy of science and adds detail to the topics addressed by Poincaré s previous book, Science… …
