Human+Evolution+Key+Words

Add a definition or explanation for the following key words of **anatomical features** important in Human Evolution. Add any other words and their explanantions, you come across in this topic area.


 * =Key Word= || =Definition or explanation= ||
 * Sexual Dimorphism || is when the males and females show a difference in their physicality, e.g. male gorillas are larger than their female counterparts. ||
 * Brow ridge ||  ||
 * Canine teeth ||  ||
 * Dentition ||  ||
 * Diastema || the gap between the upper canine and the first pre-molar that fits the lower canine ||
 * Enamel ||  ||
 * Facial angle ||  ||
 * Foramen magnum || is the hole at the base of the skull, where the spine attaches to the brain ||
 * Frontal lobe ||  ||
 * Mandible || Jaw bone ||
 * Nuchal crest || This is the site for the attachment of neck muscles ||
 * Prognathism ||  ||
 * Sagittal crest || found on the top of the skull. this is where the large jaw muscles of the hominid attach ||
 * Valgus angle || found in humans when the knee is at an angle that allows it to be under the centre of gravity of the body to help with balance while walking ||
 * Zygomatic arches ||  ||
 * Pentadactyl || having five digits ||
 * Prehensile || abiltiy to grasp objects ||

Add a definition or explanation for the following key words for the Human Evolution topic. Include a diagram, picture or link where appropriate to support your definition. Key Word || = = =Definition or explanation= || //__Homo sapiens__//. ||
 * Primate || is the Order to which humans, simians and promisians belong ||
 * Hominid ||  ||
 * Hominin ||  ||
 * Fossil evidence ||  ||
 * Robust ||  ||
 * Gracile ||  ||
 * Extinction ||  ||
 * //Australopithecine// species || species whose fossils were found in the east Africa. ||
 * //Paranthropus// species ||  ||
 * //Homo// species ||  ||
 * Selection pressures ||  ||
 * Aboreal || living on the trees ||
 * Savannah ||  ||
 * Bipedalism || ability to walk uprights using the hind two limbs ||
 * Abstract thought ||  ||
 * Cultural Evolution ||  ||
 * Social organistion ||  ||
 * Oldowan || simple river-worn pebbles that were crudely fashioned with a minimum of flakes being removed. associated with the __H//omo habilis.//__ ||
 * Achulean || crafted with a slight bulge on each broad surface.It is 'tear shaped' and often refered to as a 'hand axe'. Associated with the //__Homo erectus__// and archaic
 * Mousterian ||  ||
 * Upper Paleolithic ||  ||
 * mtDNA ||  ||
 * "African Eve" hypothesis ||  ||
 * Multiregional hypothesis ||  ||
 * Out of Africa hypothesis ||  ||
 * Replacement hypothesis ||  ||