10 STUDIES OF PLANT LIFE. 
4. The elongated, more or less curved branches are 
spermaries and the somewhat spherical ones are 
ovaries. How are they related to each other? 
Are transverse partitions (septa) to be found? Why? 
6. Is there an opening in either the spermary or ovary ? 
If so, where and why? 
7. At the distal ends of some filaments are enlarge- 
ments which produce one or more motile bodies 
(zoospores). Are they to be found and what do 
they become? 
8. Make drawings showing reproductive stages, and 
designate all parts. 
a 
Cc. Life Problems. 
Of what advantage is its branching? 
How can it grow on the land as well as in the water? 
What is the purpose of the rhizoids ? 
How does this plant obtain its food? 
What is the origin and function of the zoospore ? 
Steger 
