SEEDS AND SEEDLINGS. 43 
With the scutellum slightly spread, draw (del. 1 in.) 
and designate all regions of the embryo. 
Split the seed longitudinally and, if possible, split 
the caulicle also; with m. study both ends of the 
caulicle and find how they differ. 
Make a drawing (del. 1 in.) of one of the cut sur- 
faces and designate all structures. 
Make a drawing of a transverse section through the 
apical bud (del. 4 in.) and designate the structures. 
(c) COMPARATIVE STUDY OF OTHER SEEDS. 
Make such drawings and notes as will clearly indicate 
the results of your studies, using the terms learned 
in sections (A) and (B). 
(d) BEGINNING GROWTH (Germination?) AND COMPOSITION 
OF SEEDS. 
A. Seedlings. 
Have seedlings showing different stages of growth. 
1. Observe the parts and designate them in terms of the 
study of seeds. 
2. To what extent has the radicle end of the caulicle 
developed a root system ? 
3. To what extent have the cotyledons, plumule, or 
apical bud developed into the leafy shoot ? 
4. What directions have the shoot and root assumed? 
Why? 
Experiments 21, 22, 28. 
5. What portions of the seed are still attached? Why? 
6. Have any of the parts become green? If so, which? 
7. Make a careful drawing of each seedling in its normal 
position of growth and name the various parts. 
