6 STUDIES OF PLANT LITE. 
B. Reproductive Stage. 
1. How is the filament increased in length? (Vegeta- 
tive growth. ) 
2. Is the filament one or several individual plants? 
3. With 1.p. and h.p. study adjacent filaments with con- 
necting (conjugating) tubes, also any variations 
in cell contents. The union of two protoplasmic 
bodies (gametes) which are similar is conjugation, 
and the resulting body is a zygospore. 
4. How does the color of the conjugating filaments 
differ from that of the vegetative stage? 
5. Make a drawing showing, if possible, the different 
stages of this process and designate all parts. 
C. Life Problems. 
Where does the plant grow? 
Is it free and floating or attached? 
What is its food and how is it obtained? 
Can it grow in salt water? Why? 
Does it need light? Why? 
Experiment 13. 
Sri Co Rh 
iS 
What is the purpose of the nodule? 
Of what advantage is the filamentous form ? 
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