CONTENTS 



I. PLANTS AND WATER 



EXERCISE PAGE 



1. Plants and Water 1 



2. Does Water evaporate from Shoots? 3 



3. How much Water may evaporate from a Plant? 4 



4. What hinders the Rapid Evaporation of Water and Complete 



Drying of the Leaf ? 5 



5. Structure of Epidermis 6 



6. By what Route does Water reach the Leaves ? 7 



7. Structure of Stems, with Special Reference to Water Conduction 8 



8. Ornamental Characteristics of Oak Wood 10 



9. Physical Characteristics of Oak Wood 12 



10. General Characteristics of Hard Woods 13 



11. Characteristics of Soft Woods 14 



12. Structure of a Monocotyledonous Stem 15 



13. Water-Conducting Tissues of a Root 16 



14. Has a Root the Ability to absorb Water and to assist in raising 



it up the Stem ? 17 



15. Absorption by a Root 18 



16. Osmosis 19 



17. Does the Form and Structure of the Root favor Absorption? . . 20 



18. Relation of Root Hairs to Soil 21 



19. Composition of Some Plant Substances 22 



II. NUTRITION OF PLANTS 



20. Production of Starch in Leaves . 23 



21. The Chloroplasts 24 



22. Is Light Necessary for Starch-Making in Leaves ? 25 



23. Is Air Necessary for Photosynthesis ? 26 



24. A Waste Product of Photosynthesis 27 



25. How is Exposure to Light favored by Leaf Arrangement ? ... 28 



26. How do Plants without Chlorophyll secure their Food ? A Parasite 



as an Example 30 



27. A Saprophyte; Mold as an Example 31 



[vii] 



