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TAKE-HOME MESSAGE 1· 10 Scientifi c theories do not represent speculation or guesses about the natural world.
A great strength of scientifi c thinking, therefore, is that it helps us understand when we should change our minds.
SECOND EDITIO N A GUIDE TO BIOLOGY Phelan FM iii 9/20/11 PM This page intentionally left blank v B R I E F C O N T E N T S PART 1 The Facts of Life 1 Scientifi c Thinking | Your best pathway to understanding the world . In our initial discussion of experiments, we just described what the experiment was without examining why the researchers chose to perform the experiment the way they did.
Rather, they are hypotheses— proposed explanations for natural phenomena—that have been so strongly and persuasively supported by empirical observation that the scientifi c community views them as very unlikely to be altered by new evidence.
Hypothesis: Estrogens in sewage runoff turn male fish into hermaphrodites. udp://p4p.arenabg.com:1337/announce udp://tracker.coppersurfer.tk:6969/announce udp://tracker.leechers-paradise.org:6969/announce udp://tracker.pirateparty.gr:6969/announce What Is Life? A Guide to Biology - Second Edition pdf Gooner Is Life A Guide to Biology - Second Edition pdf This page intentionally left blank What Is LIFE? Phelan Ch 01 pp 01-3515 9/20/11 AM 16 C H A P T E R 1 • S C I E N T I F I C T H I N K I N G From our earlier discussion of critical experiments, you have a sense of how important it is to have a well-planned, well- designed experiment.A Guide to Biology Second Edition pdf Gooner Torrent Download Torrent Files list: ----------------------- What Is Life A Guide to Biology - Second What Is Life A Guide to Biology - Second 209 MB Torrent download links: ----------------------- Is Life? SECOND EDITIO N A GUIDE TO BIOLOGY Phelan FM i 9/20/11 PM Publisher: Peter Marshall Senior Development Editor: Elizabeth Howe Development Editors: Jane Tufts, Alicia Moretti Assistant Editor: Marni Rolfes Associate Director of Marketing: Debbie Clare Art Development Editor: Tommy Moorman Illustrations: Tommy Moorman Managing Editor: Philip Mc Caffrey Senior Project Editor: Mary Louise Byrd Art Director: Diana Blume Text Design: Tom Carling, Carling Design Inc Photo Editor: Christine Buese Photo Researchers: Deborah Anderson, Julia Phelan Production Manager: Susan Wein Composition and Layout: Sheridan Sellers Printing and Binding: Quebecor Dubuque Library of Congress Control Number: 2011938007 Student Edition: ISBN-13: 978-1-4641-0720-7 ISBN-10: 1-4641-0720-3 Loose-leaf Edition: ISBN-13: 978-1-4641-0587-6 ISBN-10: 1-4641-0587-1 ' 2013, 2010 by W. Freeman and Company All rights reserved Printed in the United States of America First Printing W. Freeman and Company 41 Madison Avenue, New York, NY 10010 Houndsmills, Basingstoke RG21 6XS, England FM iv 9/20/11 PM Jay Phelan University of California, Los Angeles W. F R E E M A N A N D CO M PA N Y N E W YO R K What Is LIFE? In performing experiments, our goal is to figure out whether one thing influences another thing: if an experiment enables us to draw a correct conclusion about that cause-and-effect relationship, it is a good experiment. When viewed one at a time, suspects can’t be compared in this way, and witnesses are less likely to make misidentifications. In the case of eyewitness testimony, further investigation suggests that when suspects or pictures of suspects are placed side by side, witnesses compare them and tend to choose the suspect that most resembles the person they remember committing the crime.