BIO SCI 94 Chapter Notes - Chapter 35.4: Sagittal Crest, Paranthropus, Hominidae

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 94
• Professor: Nancy Burley

Document Summary

Hands and feet that are efficient at grasping. Flattened nails instead of claws on the fingers and toes. Brains that are large relative to overall body size. Distinct ways of walking in great apes. Chapter 35. 4 -- human evolution (the primate & hominins) Primates = part of the lineage of mammals. Consist of the lemurs, lorises, pottos, and tarsiers. Paraphyletic group b/c tarsiers are closer to the anthropoids. Prosimians are small in size, reside in trees, and are active at night. Include new world monkey, old world monkeys, gibbons, and. Hominidae (great apes -- orangutans, gorillas, chimpanzees, and humans) Orangutans come to the ground and walk w/ their knuckles pressed to the ground ( fist walk ) Gorillas and chimps only knuckle walk, and sometimes rise up on their legs. Humans are the only living great ape that is bipedal (two-footed) Sequencing dna shows us that humans are most related to chimpanzees and bonobos.