Essentials of Biology (5th International Edition)
Essentials of Biology (5th International Edition)
5th Edition
ISBN: 9781259660269
Author: Sylvia S. Mader, Dr., Michael Windelspecht
Publisher: Mcgraw-Hill
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Chapter 19, Problem T16.1BYB
Summary Introduction

To Explain:

The geological time frame for the appearance of first animals appear and the first land vertebrates?

Introduction:

The geological time frame is the record of 4.6 billion years of the Earth’s history. The Precambrian time started from 4.6 billion years to 542 million years ago. The time period from 542 million years to present is known as Phanerozoic Eon. This Eon is divided into eras, periods, and epochs which has an abundant period and complex life on the Earth.

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Essentials of Biology (5th International Edition)

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