CONTENTS 



PAET L THE STRUCTURE AND FUNCTIONS OP 

 ORGANISMS THE CELL THEORY 



CHAPTER I 



PAGE 



Introductory: The nature of life The liviog organism viewed as a 

 machine The essential functions of the living body The source 

 of energy in living things . . . . . . . . 1 



CHAPTER II 

 Amoeba as a typical organism The properties of protoplasm . . 12 



CHAPTER III 

 Haematococcus The differences between animals and plants . . 27 



CHAPTER IV 



The cell theory Unicellular organisms Differentiation and division 

 of labour Co-operation The transition from the unicellular to 

 the multicellular condition The early development of multicellular 

 animals and plants ... ...... 



CHAPTER V 



The cell theory as illustrated by the histological structure of the higher 

 animals and plants Limitations of the cell theory The cell as 

 the physiological unit . . . . 



CHAPTER VI 



The multiplication of cells Mitotic and amitotic nuclear division 



PART II. THE EVOLUTION OF SEX 



CHAPTER VII 



Limitation of the powers of cell-division Rejuvenescence by conjuga- 

 tion of gametes The origin of sex in the Protista , . . 81 



