TABLE OF CONTENTS 
EXERCISE PAGE 
1. .Grasses. 1 
2. The Corn Plant . 1 
3. The Simple Flower. 3 
4. Types of Simple Flowers. 4 
5. A Composite Flower . . ‘ . 4 
6. Pollination, Part I. 5 
7. Pollination, Part II . 6 
8. Fruits. 7 
9. Seed Dispersal. 8 
10. The Seeds of the Corn and Bean. 9 
11. Corn and Bean Seedlings.10 
12. Conditions Favoring the Germination of Seeds .... 11 
13. Tests for Nutrients .12 
14. Nutrients Stored in a Seed.13 
15. The Action of Enzymes — Ptyalin upon Starch .... 15 
16. Respiration.16 
17. Roots. • ..16 
18. Root Hairs.17 
19. Transplanting Shrubs and Trees. 18 
20. Cell Structure.19 
21. Cell Division — Mitosis.19 
22. Diffusion. 20 
23. Osmosis. 21 
24. Soils.22 
25. Buds and Branches.23 
26. The Internal Structure of a Stem.24 
27. A Block of Oak Wood .25 
28. Vegetative Propagation of Plants .26 
29. The External Structure of a Leaf.27 
30. Leaf Arrangement .28 
31. The Internal Structure of a Leaf.29 
32. Photosynthesis.29 
33. Transpiration.30 
34. Alg^.31 
IX 
