446 BIOLOGY AND HUMAN LIFE 



QUESTIONS 



1. What is the most important crop plant in your region ? 



2. What part of this plant is of greatest worth ? Why ? To what 

 uses can other parts of this plant be put ? 



3. What are the conditions that influence the size or the value of the 

 crop from year to year ? 



4. What plants are cultivated in your region for beauty ? What 

 families do they represent ? 



5. What plant materials in your food are produced in your own 

 neighborhood or state ? Which ones have to be imported from other 

 states ? from Europe ? from South America ? from other places ? 



6. What plants furnish large parts of the raw material used by the 

 industries of your community or neighborhood ? 



7. What occupations or industries rely upon plants for their raw ma- 

 terials ? for their tools and implements ? 



8. What plants are injurious to the crops or materials raised or used 

 in your community ? 



9. What plants are dangerous to the dairy industry? to wheat- 

 raising ? to the trees of your region ? to the health of people ? 



10. What families of plants are represented in your region both by 

 useful members and by pests ? 



IL What are the most objectionable weeds in your region? How can 

 you recognize them ? How can they be exterminated ? 



12. What poisonous plants are there in your region ? How can they be 

 recognized? What can be done to prevent their poisoning people? to 

 cure the poison ? 



13. What plants are both useful and harmful to human interests ? 



14. What wild plants do you know that may have uses that have not 

 yet been developed ? 



15. What wild plants in your region ought to be protected from ex- 

 termination? Why? How? 



16. How can we today make use of plants that have been dead for 

 ages? 



