LABORATORY PRACTICE 



XVIII. In reviewing the work done upon seeds, fill out 

 the blanks in a table copied into the note-books from the 

 form on page 9. 



XIX. Questions about Seeds. The answers should be 

 written out carefully in the note-books. 



1. What are the essential parts of a seed (i.e. what parts 



must be present in order that any object can be 

 called a seed) ? 



2. What is the embryo? 



3. What are the parts of the embryo ? 



4. In what two ways is food stored away for the use of the 



embryo ? 



5. How do embryos differ from one another as regards the 



number of cotyledons? 



6. Is the dry seed alive or dead? Give the reasons for 



your answer. 



7. What characterizes the cotyledons which contain all the 



nourishment for the embryo ? 



8. Is the resting condition of the dry seed of any especial 



use to the plant? If so, of what use or uses may it 

 be? 



9. Why are the embryos folded up and packed away in so 



small a space ? 



