36 STUDIES OF PLANT LIFE. 
ovules (seeds). Why do the seeds have wings? 
Make a drawing of each surface of a seed-bearing 
carpel and designate all its parts. 
9. Study a longi-section of the seed body and note the 
form and position of the embryo (young sporo- 
phyte), also the endosperm and seed-coat (testa). 
Make a drawing and show all its parts. 
10. Ina this year’s cone observe the relation of the car- 
pels. Make a sketch to show its form and its 
relation to the branch. Study and explain the 
position of the cones of various years. 
Cc. Life Problems. 
1. What is the advantage in having “evergreen” nar- 
row leaves ? 
What is the origin and purpose of the resin ? 
Why is the pollen so abundant ? 
How does the pollen reach the ovule? 
What is the advantage of two kinds of shoots? 
Why is pine lumber so desirable ? 
Where are “cone-bearing” trees found in greatest 
abundance? Why? 
USE Se Ge 
