112 MORPHOLOGY AND LIFE HISTORY 



F. Reproduction: 



1. Do you find any cells that appear to be dividing? 

 If so, carefully describe their appearance. What 

 are the indications that a cell is dividing? 



2. Do the cells tend to remain united after cell divi- 

 sion? Is this true of all of them? Describe. 



3. Make three diagrams, showing (a) the life cycle of a 

 Pleurococcus plant; (b) the descendants of one plant 

 for six generations; (c) the ancestors of one plant for 

 six generations. 



4. Is there a division of physiological labor in this 

 plant, or are all life functions performed by every 

 cell? 



