stiffen — /ˈstɪfən/ (say stifuhn) verb (t) 1. to make stiff. –verb (i) 2. to become stiff or tense. –phrase 3. (God) stiffen the crows (or lizards), (an exclamation of exasperation, disgust, etc.) 4. wouldn t it stiffen you, (an exclamation of disgust.)… …
sound reception — Introduction response of an organism s aural mechanism, the ear, to a specific form of energy change, or sound waves. Sound waves can be transmitted through gases, liquids, or solids, but the hearing function of each species is particularly … Universalium
Evolution 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 )… … Wikipedia
Pterosaur — Pterosaurs Temporal range: Late Triassic–Late Cretaceous, 220–65 Ma … Wikipedia
skeleton — skeletonless, adj. skeletonlike, adj. /skel i tn/, n. 1. Anat., Zool. the bones of a human or an animal considered as a whole, together forming the framework of the body. 2. any of various structures forming a rigid framework in an invertebrate.… … Universalium
tree snake — ▪ reptile any of a number of arboreal serpents, primarily of the family Colubridae. They prey on birds and on arboreal lizards and frogs. The green tree snakes of northern South America and Central America include the slender, broad headed… … Universalium
Green Iguana — Green Iguana[1] Green iguana at the Santa Fe Zoo in Medellín, Colombia Scientific classification … Wikipedia
Coyote — For other uses, see Coyote (disambiguation). Coyote Conservation status … Wikipedia