| PAGE |
| CHAPTER I | |
| Introductory Remarks | 1 |
| CHAPTER II | |
| The Specific Difference between Living and Dead Matter and the Question of the Origin of Life | 14 |
| CHAPTER III | |
| The Chemical Basis of Genus and Species: | 40 |
| II.—The Incompatibility of Species not Closely Related | 44 |
| II.—The Chemical Basis of Genus and Species and of Species Specificity | 53 |
| CHAPTER IV | |
| Specificity in Fertilization | 71 |
| CHAPTER V | |
| Artificial Parthenogenesis | 95 |
| CHAPTER VI | |
| Determinism in the Formation of an Organism from an Egg | 128 |
|
| CHAPTER VII | |
| Regeneration | 153 |
| CHAPTER VIII | |
| Determination of Sex, Secondary Sexual Characters, and Sexual Instincts: |
| II.—The Cytological Basis of Sex Determination | 198 |
| II.—The Physiological Basis of Sex Determination | 214 |
| CHAPTER IX | |
| Mendelian Heredity and its Mechanism | 229 |
| CHAPTER X | |
| Animal Instincts and Tropisms | 253 |
| CHAPTER XI | |
| The Influence of Environment | 286 |
| CHAPTER XII | |
| Adaptation to Environment | 318 |
| CHAPTER XIII | |
| Evolution | 346 |
| CHAPTER XIV | |
| Death and Dissolution of the Organism | 349 |
| Index | 371 |