280 REPRODUCTION OF HIGHER PLANTS 



Questions and Suggestions 



1. Name the parts of a flower and give the function of each. 



2. What do we mean by self- and cross-polHnation ? What are 

 some agents of cross-polHnation ? 



3. Will the pollen of a daisy germinate on a rose? How do you 

 know ? 



4. Give the history of the pollen grain from the time it is pro- 

 duced until it functions. 



5. Give the history of an ovule until fertilization takes place. 



6. Discuss the fertilization of an ovule. 



7. How many seeds can possibly be produced in any plant ? 



8. What three processes are necessary for the formation of a seed ? 



9. Discuss the development of a seed and a fruit. 



10. Discuss the adaptations of the following plants for dispersing 

 their seeds : maple, elm, thistle, Bidens, pea, apple. 



11. Give examples of seeds or fruits dispersed by (a) wind; 

 (b) animals. 



12. Cut a longitudinal section of some fruit (apple, cucumber, water- 

 melon, pea). Draw and label seed, seed stalk, placenta, ovary wall. 



13. Plant a bean seed. When it appears above ground, uproot it 

 and draw. Label h3^pocotyl, plumule, and cotyledons. 



