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. optional) or "obligate" (the animal has no reasonable alternative). Is the discipline of defining groups of biological organisms on the basis of shared characteristics. Bipedalism - Definition - Facultative and Obligate Bipedalism. Facultative and Obligate Bipedalism. Advantages. Definition The word is derived from the Latin words bi(s) 'two' and ped-'foot', as contrasted with quadruped 'four feet'. 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. Definition. Definition. 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. Facultative bipedalism has evolved independently in numerous lizard clades as a consequence of acceleration and changes in BCoM (Aerts et al., 2003; Clemente, 2014). Types of Cellular Respiration. Bipedalism definition is - the condition of having two feet or of using only two feet for locomotion. Obligate Bipedalism: Definition. The parasite is an organism which lives on or within another living organism … Obligate: Obligate means to be restricted to a particular characteristic. discussed, facultative bipedalism is a likely intermediate. 2 legs, but only a few animals practice bipedalism as their usual means of locomotion. Key Difference – Obligate vs Facultative Parasite Parasitism is a kind symbiotic relationship between two organisms in which one is benefited while the other is not. Zoologists often label behaviors, including bipedalism, as "facultative" (i.e. Definition. 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. Facultative: Facultative refers to the ability to live under more than one specific environmental condition. Animals that assume bipedalism on a temporary basis in order to function: Term. The word is derived from the Latin words bi(s) 'two' and ped-'foot', as contrasted with quadruped 'four feet'.. Zoologists often label behaviors, including bipedalism, as "facultative" (i.e. Advantages Limited and exclusive bipedalism can offer a species several advantages. Limited and exclusive bipedalism can offer a species several advantages. 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