ENV100Y5 Chapter Notes -Homininae, Hylobates, Hominidae

52 views2 pages
1 Aug 2014
School
Department
Course
yifanyang and 39662 others unlocked
ENV100Y5 Full Course Notes
69
ENV100Y5 Full Course Notes
Verified Note
69 documents

Document Summary

What separates us from the chimps: brain size. Neoteny: retention of juvenile features: speech. Changes in the hyoid bone and larynx. Adaptive pressure to move from gestures speech. Not clear when it evolved: bipedalism. Why be bipedal: leaves hands free for tool use; gesturing, able to run and throw, able to carry offspring better, babies can be born at a less developed state (bigger brains) Bipedalism: thermoregulation: expose less body surface to the sun, postural feeding: easier to feed from low branches, better field of view: easier to see over tall grass; keep social contract; efficient gait for crossing open spaces. Lived from 400,000 to about 30,000 years ago. Neanderthals interbred with homo sapiens after h. sapiens move out of africa. Modern non-africans: 1% to 5% of dna derived from neanderthal. Competition from homo sapiens probably contributed to neanderthal extinction. Certain traits (skin colour, nose shape, etc) have arisen as adaptations to new environments.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents