Figure 20.1 Two models for the diversification of marine invertebrate life over the past 600 myr of good- quality fossil records. (a) The empirical model,
CHAPTER 20 HISTORY OF THE VERTEBRATES. THE PALEOZOIC ERA Scientists divide the earth’s past into different time periods. Large blocks of time are called.
Green economy strategies and implementation plan in developing countries: The case of Ethiopia Alemu Mekonnen Department of Economics at Addis Ababa University.
Figure 20.1
