XIV CONTENTS 



CHAPTER XI 

 Storage of Food and Water 



PAGE 



Need of Food Storage.— The Kinds of Stored Food.— The 

 Process of Storage. — ^Location and Extent of Food 

 Storage Tissues. — Fluctuations in the Solubility and 

 Insolubility of Stored Food. — Digestion of Stored Food. 

 — Assimilation of Food. — Relation of Stored Food to 

 Energy Supply. — The Storage of Water. — Character- 

 istics of Water Storage Tissues. — Illustrative Studies. 175-198 



CHAPTER XII 



Secretion and Excretion 



Nature of Secretions and Excretions. — Secreting Cells and 

 Glands in General.^ — Laticiferous Vessels or Milk Tubes. 

 — Tannin Cells. — Special Enzyme-secreting Cells. — 

 Secretion and Excretion of Minerals. — The Process of 

 Secretion. — The Excretion of Liquid Water. — Illustra- 

 tive Studies 199-212 



CHAPTER XIII 



Reproduction 



Development of Fern Sporangium. — Division of Spore 

 Grandmother Cells. — Germination of the Spores. — 

 Fertilization of the Egg. — Interpretation of the Processes 

 of Nuclear Division. — Two Generations in the Life- 

 cycle. — Spore Formation in Spermatophytes. — ^Forma- 

 tion of the Microspores. — Details of Nuclear Division. — 

 Formation of the Megaspores. — Details in Division of 

 Megaspore Grandmother Cell. — Germination of the 

 Megaspore. — ^Fertilization and Germination of the Egg. 

 — The Triple-fusion Nucleus. — Behavior of Pedigree 

 Hybrids. — Interpretation of Mendel's Results. — ^Pater- 

 nal and Maternal Chromosomes. — Bearers of Hereditary 



