INDEX 



Adjustability, 5. 



Alg-ae, 12, 28, 30, 31, 50, 72, 79 



Alternation of generations, 58, 



78, 79, 104. 

 Antheridium, 67, 74. 

 Aphids, 86. 



Archegonium, 67, 74. 75. 

 Artificial fertilization, 65. 

 Assimilation, 10. 



Bacteria, 17, 128. 

 Bee, 84. 



Beginnings of life, 2. 

 Birds, 93. 

 Budding, 26. 

 Buds, 20. 



Capsule, 75. 

 Cell, 15. 



Cell division, 122. 

 Chlorophyll, 50. 

 Chromatin, 55. 

 Chromosomes, 55, 81. 

 Cilia, 30. 

 Circle of life, 1. 

 Cloaca, 95. 

 Cncnon, 124. 

 Coelenterates, 82. 

 Coluny, 22. 

 Conjugation, 48. 

 Copulation, 95, 98. 

 Cross fertilization, 134. 

 Crossing breeds, 133, 

 Cytoplasm, 55. 



Darwin, Charles, 135. 

 Death, 6. 

 Determiners, 64. 

 Differentiation, 90, 122. 

 Differentiation of sex, 68, 96. 

 Direct development, 123. 



Earthworm, 68. 

 Eggs, 53, 60. 

 Embryo, 89, 95, 98. 

 Environment, 7. 



Female characteristics, 69. 

 Ferns, 72, 129. 

 Fertilization, 54, 59. 

 Fission, 20. 

 Flagellum, 57. 

 Flower, 102. 

 Fly, 129. 



Foot of moss, 75. 

 Frogs, 88. 



Gametes, 49, 98. 

 Gametophyte, 58, 75. 

 Gemmae, 26. 

 Genetics, 64. 

 Germination, 31. 

 Grafting, 26. 

 Growth, 2, 122. 

 Growth of plants, 2. 



Habit, 112. 

 Hermaphrodite, 66. 

 Homes, 116. 

 Honey bee, 85. 

 House fly, 129. 

 Hybrids, 136. 

 Hydatina, 85. 

 Hydra, 23. 

 Hydroids, 40, 82. 



Immaturity, 3. 

 Instinct, 112. 

 Internal cell division, 27. 

 Invertebrates, 88. 



Jelly fish, 82. 

 Jordan, D. S., 129. 



Larva, 4, 124. 



Mammals, 97. 

 Man, 97, 130. 

 Marriage, 118. 

 Marsupials, 99. 

 Maturity, 4. 

 Megaspore, 105. 

 Metamorphosis, 123. 

 Milk, 100. 



Monarch butterfly, 125. 

 Monogamy, 118. 

 Mosses, 72. 

 Mule, 136. 



Nucleus, 55. 



Oedogonium, 67. 

 Old age, 5. 

 Oogonium, 67. 

 Ova, 57. 

 Ovary, 67. 

 Oviduct, 94. 



143 



