MARCHANTIA POLYMORPHA 



95 



E. Comparison of Gametophyte and Sporophyte: 



1. Compare the degree of development or organiza- 

 tion of sporophyte and gametophyte. 



2. Copy the following table into your laboratory note- 

 book and mark x after the word gametophyte or 

 sporophyte in the proper column. 



TABLE II 



3. State reasons why you consider Marchantia higher 

 or lower than (a) the moss; (b) the fern. 



4. Diagram the life cycle of Marchantia, as directed 

 for the fern (/, n, p. 72). 



5. Indicate the life history of Marchantia for three gen- 

 erations, as directed in /, 10, p. 72. 



6. Does the gametophyte ever produce another game- 

 tophyte directly? Does the sporophyte ever pro- 

 duce another sporophyte directly? If so, explain 

 how. What phase intervenes between two gameto- 

 phytes in the alternation of generations? Between 

 two sporophytes? Is this always the case so far 

 as your own studies show? Explain what is meant 

 by the expression, "alternation of generations." 



