CHAPTER 8 Facultative bipedalism: only going on 2 feet when you need to Orthograde [trunk]: indicates upright posture Dating methods: Relative – older or younger:-Stratigraphic: analyze order and position of layers of remains and put in geological time scale-Biostratigraphi/faunal correlationc: fossils and their use in dating rock formations. Advantages Limited and exclusive bipedalism can offer a species several advantages. Bipedalism definition is - the condition of having two feet or of using only two feet for locomotion. Types of Cellular Respiration. The position of the BCoM varies depending on the length of the trunk and tail relative to the hip ( Van Wassenbergh and Aerts, 2013 ). Obligate: Obligate means to be restricted to a particular characteristic. 2 legs, but only a few animals practice bipedalism as their usual means of locomotion. Definition. optional) or "obligate" (the animal has no reasonable alternative). Facultative: Facultative organisms obtain energy from aerobic respiration, anaerobic respiration, and fermentation. The australopithecines possessed these traits and must have been adapted to arboreal quadrupedal vertical climbing, having the capacity, at the same time, to perform facultative terrestrial bipedalism, moving on the ground in a manner visually identical to that of humans. discussed, facultative bipedalism is a likely intermediate. Zoologists often label behaviors, including bipedalism, as "facultative" (i.e. Zoologists often label behaviors, including bipedalism, as "facultative" (i.e. The word is derived from the Latin words bi(s) 'two (2)' and ped-'foot', as contrasted with quadruped 'four feet'.. Facultative and obligate bipedalism. Facultative bipedalism has evolved independently in numerous lizard clades as a consequence of acceleration and changes in BCoM (Aerts et al., 2003; Clemente, 2014). Facultative reinsurance is purchased by a primary insurer to cover a single risk—or a block of risks—held in the primary insurer's book of business. The parasite is an organism which lives on or within another living organism … Is the discipline of defining groups of biological organisms on the basis of shared characteristics. Definition. Animals, including chimpanzees and gorillas, that assume bipedalism on a temporary basis in order to perform a particular function practice a form of locomotion called facultative bipedalism… Definition The word is derived from the Latin words bi(s) 'two' and ped-'foot', as contrasted with quadruped 'four feet'. Facultative: Facultative refers to the ability to live under more than one specific environmental condition. Advantages. Definition. Obligate Bipedalism: Definition. The word is derived from the Latin words bi(s) 'two' and ped-'foot', as contrasted with quadruped 'four feet'.. Definition. 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