PRENTICE-HALL BIOLOGICAL SCIENCE SERIES 

 Editors: William D. McElroij and Carl P. Swanson 



CLASSIC PAPERS IN GENETICS, bv James A. Peters 

 MILESTONES IN MICROBIOLOGY, by Tbomas D. Brock 

 PRINCIPLES OF BIOLOGY, by Neal b. Buffaloe 

 A SYNTHESIS OF EVOLUTIONARY THEORY, by 

 Herbert H. Ross 



FOUNDATIONS OF MODERN BIOLOGY: 



ADAPTATION, bv Bruce Wallace and A. M. Srb 

 ANIMAL BEHAVIOR, by Vincent Dethier and Eliot Stellar 

 ANIMAL DIVERSITY, bv Earl D. Hanson 

 ANIMAL GROWTH AND DEVELOPMENT, by Maurice 



Sussman 

 ANIMAL PHYSIOLOGY, bv Knut Schmidt-Nielson 

 THE CELL, by Carl P. Swanson 

 CELLULAR PHYSIOLOGY AND BIOCHEMISTRY, by 



William D. McElrov 

 HEREDITY, by David M. Bonner 



THE LIFE OF THE GREEN PLANT, bv Arthur W. Galston 

 MAN IN NATURE, bv Marston Bates 

 THE PLANT KINGDOM, bv Harold C. Bold 



> 



A SYNTHESIS OF EVOLUTIONARY THEORY, by 

 Herbert H. Ross 



©—1962 by Prentice-Hall, Inc., Englewood Cliffs New Jersey. 

 All rights reserved. No part of this book may be reproduced 

 in any form, by mimeograph or any other means, without 

 permission in writing from the publisher. 



Second printing March. 1964 



Library of Congress Catalog Card No. : 62-8859 



Printed in the United States of America 

 87994-C 



