Chapter+12

= Chapter 12 Resources = 12.1 Isotope 12.2-The Geologic time scale Link: [] 12.3 [|Origin of Life]

12.4 [|Early single-celled organisms] 12.5 [] i chose this site because it tells what the cambrian explosion is and how it happened.The book only tells what it is. 12.6 Ichose this site because it tells how primates are related to proimian,anthropoid,hominid,and bipedal.