Life Sciences Standards Preview Standard Set 2. Life Sciences 2. Plants and animals have predictable life cycles. As a basis for understanding this concept: 2.b. Students know the sequential stages of life cycles are different for different animals, such as butterflies, frogs, and mice. Genre Nonfiction Comprehension Skill State the Purpose Text Features Captions Labels Glossary Science Content Animal Life Cycles Scott Foresman Science 2.4 ISBN 0-328-23503-2 ì<(sk$m)=cdfadc< +^-Ä-U-Ä-U by Nancy Day Vocabulary amphibian insect larva life cycle mammal pupa tadpole Picture Credits Every effort has been made to secure permission and provide appropriate credit for photographic material. The publisher deeply regrets any omission and pledges to correct errors called to its attention in subsequent editions. Unless otherwise acknowledged, all photographs are the copyright of Dorling Kindersley, a division of Pearson. ISBN: 0-328-23503-2 Copyright © Pearson Education, Inc. All Rights Reserved. Printed in the United States of America. This publication is protected by Copyright, and permission should be obtained from the publisher prior to any prohibited reproduction, storage in a retrieval system, or transmission in any form by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permission(s), write to Permissions Department, Scott Foresman, 1900 East Lake Avenue, Glenview, Illinois 60025. 1 2 3 4 5 6 7 8 9 10 V010 13 12 11 10 09 08 07 06 by Nancy Day What is a life cycle? Living things grow. Living things change. This growth and change is called a life cycle. Every life cycle has steps or stages. Animals look different at each stage. All animals change size. Many animals change shape. Some animals change color. Living things have life cycles. Living things change size. 2 3 Growing and Changing in Different Ways A mammal is an animal. Young mammals look like their parents. They change size as they grow