BIOLOGY 1M03 Study Guide - Final Guide: Sahelanthropus, Foramen Magnum, Canine Tooth

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1M03
• Professor: Ben Bolker

Document Summary

Bipedal locomotion we do this on a daily basis: 2. Dental morphology we have a wide parabolic dental arcade, thick molar enamel, reduced canine teeth larger molars, large posterior teeth: 3. Larger brains relative to body size: 4. Slow development with a long juvenile period: 5. Cultural adaptation we depend on material and symbolic culture that is transmitted through spoken language. Sahelanthropus tchadensis: earliest/ oldest known hominin w/ a mix of derived and primitive features, fossil found w/ complete cranium (skull minus lower jawbone), 4 partial mandibles, 4 teeth in. Sexual dimorphism: canines of primates give info about their social organization. In pair-bonded species there is little sexual dimorphism in canine size. In non pair-bonded species male canines are bigger than female canines (ex. Ramidus males have larger canines than females: not clear whether reduction in sexual dimorphism in canine size is linked to reduction in sexual dimorphism in body.