VAUCHERIA SESSILIS 



What is the organ that bears the sperms called? 

 The base of the antheridial branch is the pedicel, 

 or stalk. 



4. Can you detect any sperms escaping? If so, 

 observe and describe them carefully. See if you 

 can find any empty antheridia. 



5. Make careful drawings showing all points observed 

 under G. 



6. Is there a division of physiological labor in Vauch- 

 eria? Explain in detail. 



7. Show, by a diagram, the life cycle of Vaucheria. 



8. State the difference between conjugation and 

 fertilization. 



9. Draw an ideal diagram of a complete plant, showing 

 all structures, and stages of their development. 



