CONTENTS 

 PAET I 



INTRODUCTORY STUDY: PRINCIPLES OF BIOLOGY 



CHAPTER PA6K 



I. BIOLOGY: THE SCIENCE OF LIFE ...... 1 



II. CHANGES AND COMPOSITION OF LIFELESS AND LIVING MATTER 5 



III. THE CHARACTERISTICS OF LIVING THINGS . . .10 



I. Chemical Composition of Living compared with Life- 

 less Things. II. Life-Activities : (a) Animals, (&) Plants 



IV. THE STRUCTURE AND LIFE OF AN ANIMAL : INTRODUCTION 



TO ANIMAL BIOLOGY 23 



The Structure (Anatomy) of the Frog .... 25 



The Tissues of the Frog : Introduction to Microscopic Study 37 

 The Work of Organs of the Frog : Introduction to Animal 



Physiology 44 



Development of the Frog : Introduction to Embryology . 57 



Classification of the Frog 64 



V. THE STRUCTURE AND LIFE OF A PLANT : INTRODUCTION TO 



PLANT BIOLOGY ........ 66 



The Structure of a Bean Plant 67 



The Reproduction of the Bean Plant 76 



The Work of the Organs of a Plant : Introduction to Plant 



Physiology ......... 85 



Classification of the Bean Plant 121 



VI. COMPARISON OF ANIMAL AND PLANT BIOLOGY . . . 122 



VII. CLASSIFICATION OF ANIMALS AND PLANTS .... 133 



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