Upper+jaw
51Evolution of mammals — Restoration of Thrinaxodon, a member of the cynodont group, which includes the ancestors of mammals Further information: Evolutionary history of life The evolution of mammals within the synapsid lineage (sometimes called mammal like reptiles )… …
52snake — snakelike, adj. /snayk/, n., v., snaked, snaking. n. 1. any of numerous limbless, scaly, elongate reptiles of the suborder Serpentes, comprising venomous and nonvenomous species inhabiting tropical and temperate areas. 2. a treacherous person; an …
53Horse teeth — Horses teeth are often used to estimate the animal s age, hence the sayings long in the tooth and Don t look a gift horse in the mouth . Types of teeth At five years of age a horse has between 36 and 44 teeth. All horses have* Twelve premolars… …
54crocodile — crocodiloid /krok euh dil oyd, krok euh duy loyd/, adj. /krok euh duyl /, n. 1. any of several crocodilians of the genus Crocodylus, found in sluggish waters and swamps of the tropics. 2. any reptile of the order Crocodylia; crocodilian. 3. the… …
55Iguanodon — Taxobox name = Iguanodon fossil range = Early Cretaceous image width = 250px image caption = Iguanodon bernissartensis skull regnum = Animalia phylum = Chordata classis = Sauropsida superordo = Dinosauria ordo = Ornithischia subordo = Cerapoda… …
56Evolution of mammalian auditory ossicles — The evolution of mammalian auditory ossicles is one of the most well documented[1] and important evolutionary events, demonstrating both numerous transitional forms as well as an excellent example of exaptation, the re purposing of existing… …
57Life 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… …
58digestive system, human — Introduction the system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract (alimentary canal), or the series of structures and organs through which food and liquids pass… …
59Human Race — Human Race † Catholic Encyclopedia ► Human Race Mankind exhibits differences which have been variously interpreted. Some consider them so great that they regard the varieties of the human race as distinct species; others maintain the… …
60Anthropology and Archaeology — ▪ 2009 Introduction Anthropology Among the key developments in 2008 in the field of physical anthropology was the discovery by a large interdisciplinary team of Spanish and American scientists in northern Spain of a partial mandible (lower… …
