marked+occurrence
51Tertiary Period — Interval of geologic time, 65–1. 8 million years ago. It constitutes the first of the two periods of the Cenozoic Era, the second being the Quaternary. The Tertiary has five subdivisions: (from oldest to youngest) the Paleocene, Eocene, Oligocene …
52chemical element — Introduction also called element, any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is composed. This article considers the… …
53digestive system disease — Introduction any of the diseases that affect the human digestive tract. Such disorders may affect the esophagus, stomach, small intestine, large intestine (colon), pancreas, liver, or biliary tract. A prevalent disorder of the digestive… …
54LINGUISTIC LITERATURE, HEBREW — This article is arranged according to the following outline: introduction foreword the beginning of linguistic literature linguistic literature and its background the development of linguistic literature Foreword: A Well Defined Unit the four… …
55Major depressive disorder — For other depressive disorders, see Mood disorder. Major Depressive Disorder Classification and external resources …
56community ecology — Introduction study of the organization and functioning of communities (community), which are assemblages of interacting populations of the species living within a particular area or habitat. As populations of species interact with one …
57Basque language — Basque Euskara Spoken in  Spain …
58Speed Racer — For the 2008 film, see Speed Racer (film). For other uses, see Speed Racer (disambiguation). Speed Racer A picture of Gō Mifune (a.k.a. Speed Racer) …
59MOROCCO — MOROCCO, westernmost country in North Africa. The first arrival of Jews in Morocco goes back to antiquity. There are numerous legends which claim that they settled in the country before the destruction of the First Temple. From the fifth to the… …
60formal logic — the branch of logic concerned exclusively with the principles of deductive reasoning and with the form rather than the content of propositions. [1855 60] * * * Introduction the abstract study of propositions, statements, or assertively used …
