QUESTIONS AND SUGGESTIONS 411 



a difference between the behavior of its egg and the egg of an animal. 



10. Describe Vaucheria, defining coenocyte. 11. Describe Spirogyra. 

 D. 12. Name the four groups of alga and explain the meaning 



of the names. 13. Describe the brown algas. 14. Describe the red 

 algse. 



Section 72. i. State the general characteristics of fungi. 2. Give 

 three examples of fungi which you have seen. 



A. 3. Explain the difference between parasite and saprophyte, 

 defining the word host. 



B. 4. State the general facts as to the economic importance of 

 fungi to man, defining decomposition. 



C. 5. State a fundamental principle of sanitation with reference 

 to bacteria. 6. Give the general facts as to bacteria. 7. What is the 

 principal way in which soil bacteria are helpful to crops ? 8. Describe 

 the relationship of certain soil bacteria to Leguminosx, defining 

 tubercles. 



D. 9. Describe mycelium. 10. Describe the life of toadstools, 

 defining hyphse, sporophore, stipe, pileus, gills, basidium, and spawn. 



11. Describe the culture of mushrooms. 12. State the difference 

 between toadstools and mushrooms, and tell what you know about 

 edible fungi. 13. Describe bread mold, defining haustoria. 14. De- 

 scribe lilac mildew, defining ascus and ascocarp. 15. Describe wheat 

 rust, defining its four kinds of spores. 16. Name the three great 

 groups of true fungi, explaining what these names mean. 17. State 

 the chief characteristics of these three groups. 



E. 18. Describe mycorhiza. Of what advantage is it believed to 

 be to the plants which have it ? 



F. 19. Describe lichens. Where have you seen them growing? 

 20. Why are lichens called pioneer plants ? How do they reproduce ? 



Section 73. i. State a fundamental difference between mosses 

 and liverworts. 2. Describe what is thought to be the way in which 

 plant life came from the water to the land. What is meant by an 

 amphibious plant? 3. Describe the vegetative (non-reproductive) 

 structure of Marchantia as described by the text and the pictures. 



A. 4. Describe the asexual methods of reproduction in Mar- 

 chantia, defining cupules and gemmas. 5. Describe the sex method 

 of reproduction in Marchantia, defining archegonia and antheridia. 

 6. Describe the sporogonium, defining foot, stalk, and elaters. 



