QUESTIONS AND SUGGESTIONS 323 



QUESTIONS AND SUGGESTIONS 



Section 60. i. Define flowers as to structure and function. 

 2. Why are flowers used as the principal means for the identification 

 of plants ? 



A. 3. Define pollination and indicate the apparent extent of its 

 influence upon flower forms. 4. Discuss the two kinds of pollination. 

 5. What are the agencies by means of which cross-pollination is 

 chiefly accomplished ? 6. Define nectar and indicate its use to the 

 plant. 7. Describe wind-poUinated flowers and give examples. 



B. 8. Describe the protective organs of the flower. 



C. 9. Explain what is meant by evolution, using flowers as an 

 illustration. 10. Why are leaves more alike than flowers are? 

 II. Give reasons for the study of non-seed plants. 



D. 12. Define spore, generation, and pollen tube. 13. Explain 

 why it is inaccurate to call a flower a sex organ. 



Section 61. A. i. Explain what are the essential and what the 

 accessory parts of flowers, and why they are such. 2. Give examples 

 of flowers whose essential parts are undeveloped. Explain this lack 

 of development. 



B. 3. Describe the perianth, and define naked flower. 



C. 4. Describe stamens, defining androecium, anther, filament, 

 and pollen sacs. 5. Describe the pistil, defining gynoecium, ovary, 

 style, stigma, and ovule. 6. Describe fertilization, defining gamete, 

 sperm, and egg. 7. Contrast fertiUzation with pollination. 8. De- 

 scribe the ovule, defining micropyle, nucellus, and integument. 



D. 9. Describe the receptacle. 



Section 62. i. Why are nutritive organs less useful in classifica- 

 tion than reproductive organs are ? 



A. 2. Discuss the work of Linnasus. 3. What is meant by the 

 "real kinships" of plants? 



B. 4. Define diclinous and monoclinous, staminate and pistillate. 

 5. Give examples of diclinous flowers other than those given in the 

 book. 6. Describe the flowers and the pollination of corn. 7. Define 

 monoecious, dioecious, and polygamous, giving examples. 



C. 8. Explain in what respects the water lily is thought to be a 

 primitive type of flower. 9. Define sympetalous and polypetalous, 

 giving examples. 10. Define zygomorphic and actinomorphic. 



