LIFE: THE SCIENCE OF BIOLOGY
LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 9781319145125
Author: Sadava
Publisher: MAC HIGHER
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Chapter 1.1, Problem 1R
Summary Introduction

To review:

The relation between the atmospheric levels of oxygen and the terrestrial environment colonization.

Introduction:

Earth’s atmospheric oxygen level is closely linked to the evolution of life. In the late Paleozoic era, around 300 million years ago the level of atmospheric oxygen was much higher than that of today. Due to this reason, many animal groups showed an increase in size, in some insects, and the wingspan enlarged to two feet.

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