SPIROGYRA SP. IOQ 



11. Is there a physiological division of labor in this 

 plant? Explain in detail. 



12. Draw a diagram showing the ancestors of a plant 



of Spirogyra for three generations. 



13. To complete your notes on Spirogyra, write, at 

 home, and before the next laboratory period, as 

 clear and well -worded an account as you can of 

 the life history of the plant. 



14. Arrange ferns, algae, mosses, liverworts, in a 

 vertical column in the order of the complexity of 

 their organization, placing the more highly organ- 

 ized near the top of the column. Write a clear 

 statement of the reasons for your arrangement 

 of the above classes. 



