WATEE SILK 61 



gle plant consisting of many similar cells, or a colony 

 of unicellular plants ? Why ? What do you regard as 

 the main points of diflference between Spirogyra and 

 Protococcus considered both morphologically and phys- 

 iologically ? Between yeast and Sjpirogyra ? 



Keview all of your studies of animal and plant cells. 

 Do you consider the cell to be an organized body ? If 

 so, why ? 



