CONTENTS INTRODUCTION CHAPTER 1 THE VARIETY OF ANIMAL LIFE 12 CHAPTER 2 CASSIFICATION AND BEHAVIOR 33 CHAPTER ANIMALS WITHOUT BACKBONES 50 CHAPTER 4 ANIMALS WITH BACKBONES 61 75 77 CONCLUSION GoSSARY For MORE INFORMATION BIBLIOGRAPHY 80 83 INDEX 84
nimals are everywhere Even busy New York City full of cars and concrete is teeming with animal life Ants march up a sidewalk Pigeons peck at crumbs while squirrels search for nuts A horse drawing a carriage trots by Boston terriers dragging their owner to the dog park A gray rat skitters across sub way tracks while a cat stares down from a skyscraper at tiny taxis and people below pe No matter where you live you will be sur rounded by animals including human beings This book will help you learn more about your fellow members of the animal kingdom There are more than ten million kinds of animals in the world and about 1 3 mil lion have been identified by scientists All life forms started in the same place in the oceans some 3 5 billion years ago Our com mon ancestors were simple single celled organisms Over time many living things became more complex as they adapted to various environments Multicellular organisms began to form and separate into different species as they moved Some moved into freshwater others to
A Closer Look at the Animal Kingdom
Survey the various members of the animal kingdom and the habits, behaviors, and physical characteristics that unite and distinguish animals.
About This Book
By: Sherman Hollar
Illustrated by:
Published by: Rosen Publishing provided by Britannica
