88 MORPHOLOGY AND LIFE HISTORY 



area of the chlorophyll-bearing tissues? Explain 

 how this affects the process of photosynthesis. 



3. State the organs and processes by which water and 

 inorganic salts are taken in by the gametophyte. 



4. Explain the presence or absence of stomata in this 

 plant. 



5. By what organs is the respiration of the gameto- 

 phyte carried on? 



6. Does the gametophyte have to elaborate food in ex- 

 cess of its own needs? Explain. Explain the need 

 or lack of need of conducting tissues in the gameto- 

 phyte. 



7. Name two ways in which the gametophyte is kept 

 rigid and erect. 



The sporophyte 



8. Can the sporophyte lead an independent existence 

 at any time in its history? Explain. 



9. By what organ or organs, by what process, and from 

 what source are water and dissolved food substances 

 taken into the sporophyte? 



10. Is photosynthesis possible in the sporophyte at any 

 period of its existence? What is the source of its 

 carbohydrate food? 



11. Explain the need or lack of need of conducting tis- 

 sues in the sporophyte. Compare the degree of 

 development of these tissues in the sporophyte and 

 gametophyte of the moss. 



12. Explain the significance of the presence or absence 

 of stomata in the sporophyte. 



13. Refer to the question in F, 13, and explain the origin 

 of the calyptra. To which generation does it be- 

 long? Explain. 



