Investigating Simple Organisms: Life Science

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For many centuries, scientists believed there were only two kingdoms, or groups of living things: plants and animals. But Anton van Leeuwenhoek made microscopes in the 17th century that also proved there are microorganisms, or microbes. Microbes can help keep people stay healthy, but some also can make people sick.

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Science Readers Life Science Lisa Zamosky TCM 10587 Quality Resources for Every Classroom Instant Delivery 24 Hours a Day Thank you for purchasing the following e-book –another quality product from Shell Education For more information or to purchase additional books and materials, please visit our website at: www.shelleducation.com For further information about our products and services, please e-mail us at: [email protected] To receive special offers via e-mail, please join our mailing list at: www.shelleducation.com/emailoffers 5301 Oceanus Drive Huntington Beach, CA 92649-1030 714.489.2080 FAX 714.230.7070 www.shelleducation.com S964 Lisa Zamosky Life Science Readers: Investigating Simple Organisms Publishing Credits Editorial Director Dona Herweck Rice Creative Director Lee Aucoin Associate Editor Joshua BishopRoby Illustration Manager Timothy J. Bradley Editor-in-Chief Sharon Coan, M.S.Ed. Publisher Rachelle Cracchiolo, M.S.Ed. Science Contributor Sally Ride Science™ Science Consultants Thomas R. Ciccone, B.S., M.A.Ed., Chino Hills High School Dr. Ronald Edwards, DePaul University Table of Contents Discovering Small Organisms........................................... 4 The Kernel Trick............................................................... 6 Bacteria and Archaea Kingdoms...................................... 8 Protista Kingdom........................................................... 10 Fungi Kingdom.............................................................. 22 The World of Simple Organisms..................................... 26 Appendices..................................................................... 28 Lab: Preventing the Spread of Infection............ 28 Glossary............................................................ 30 Index................................................................. 31 Sally Ride Science.............................................. 32 Image Credits.................................................... 32 Teacher Created Materials Publishing 5301 Oceanus Drive Huntington Beach, CA 92649-1030 http://www.tcmpub.com ISBN 978-0-7439-0587-9 © 2008 Teacher Created Materials Publishing Discovering Small Organisms There are many different kinds of living things in the world. Scientists have ways of putting living things into groups. These groups are called kingdoms. For many centuries, scientists thought that there were only two kingdoms of living things. They were plants and animals. Leeuwenhoek’s Microscopes Leeuwenhoek made some of the first microscopes. He built over 400 of them. Nine of them still exist today. Some people think he invented the microscope, but he didn’t. A man named Anton van Leeuwenhoek (ANtahn vahn LAY-vuhn-hook) was a scientist. He made fantastic microscopes. They made tiny things look bigger. Things that could not be seen Anton van Leeuwenhoek with the human eye could now be seen. In 1673, Leeuwenhoek looked at a drop of water under his microscope. What he saw shocked him. There were very small things swimming in the water. They were tiny, simple