ancestor group
21Khoisan languages — Group of more than 20 languages presently spoken by perhaps several hundred thousand Khoekhoe and San peoples of southern Africa. A number of Khoisan languages are now either extinct or spoken by very few people. Their most distinctive linguistic …
22Nilo-Saharan languages — Group of perhaps 115 African languages spoken by more than 27 million people from Mali to Ethiopia and from southernmost Egypt to Tanzania. The concept of Nilo Saharan as a single stock combining a number of earlier groupings was introduced in… …
23endocrine system — Group of ductless glands that secrete hormones necessary for normal growth and development, reproduction, and homeostasis. The major endocrine glands are the hypothalamus, pituitary, thyroid, islets of Langerhans, adrenals, parathyroids, ovaries …
24Nubian languages — group of languages spoken in The Sudan (Sudan, The) and southern Egypt, chiefly along the banks of the Nile River (where Nobiin and Kenzi [Kenuzi] are spoken) but also in enclaves in the Nuba Hills of central Sudan (Hill Nubian) and in… …
25clade — Group of organisms, such as a species, whose members share homologous features derived from a common ancestor; one particular monophyletic branch in a cladogram …
26Cladistics — For the scientific journal, see Cladistics (journal). Part of a series on Evolutionary Biology …
27Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …
28evolution — evolutional, adj. evolutionally, adv. /ev euh looh sheuhn/ or, esp. Brit., /ee veuh /, n. 1. any process of formation or growth; development: the evolution of a language; the evolution of the airplane. 2. a product of such development; something… …
29Paraphyly — A cladogram showing a hypothetical descent from an ancestor species of the clade vertebrata.[1] Note that cladograms do not necessarily correspond to taxonomic classifications. In this one, Sauropsida are a paraphyletic group. It can be made… …
30Southeast Asian arts — Literary, performing, and visual arts of Myanmar (Burma), Thailand, Laos, Cambodia, Vietnam, Malaysia, Singapore, and the Philippines. The classical literatures of Southeast Asia can be divided into three major regions: the Sanskrit region of… …
