Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
4th Edition
ISBN: 9781259853197
Author: Robert Brooker
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 22, Problem 9TY
Summary Introduction

Introduction: The Paleozoic era is subdivided into six periods: Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian. Periods are named after regions where rocks and fossils of that age were first discovered. . The Mesozoic era is divided into three periods, namely the Triassic, Jurassic and Cretaceous.

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From Sea to Changing Sea | Early Life in the Oceans || Radcliffe Institute; Author: Harvard University;https://www.youtube.com/watch?v=Ac0TmDf5Feo;License: Standard youtube license