QUESTIONS 17 



the other open. After 24 hours test both with a Ijiiniiiig match. What 

 is the result? Explain. 



21. Repeat, but instead of testing with a mutch pour a little lime water 

 into each. Wha^ is the result? Explain. 



QUESTIONS 



1. What are the three most important part^ of the seed? 



2. What are the parts of the embryo? 



3. Why are the seeds of many plantsi valuable as food for man and 

 animals? 



4. Make a list of seeds used for food by man. 



5.. What are the two main classes of seeds and what are their 

 characters ? 



6. In what part or parts of the seed is the food stored? 



7. What are the functions of the cotyledons? 



8. What are the hypocotyl, the radicle, the epicotyl, tlie hiluni, the 

 raphe, the micropyle, and the caruncle? 



9. What are the necessary factors for seed germination? 



10. Make a list of seeds that are planted in the spring, 



11. Make another list of seeds that are planted in the fall. 



12. What does the sprouting seed obtain from the air? 



13. What is the eft'ect of too much water on field crops? 



14. When a seed sprouts, what part comes through the seed coat 

 first? 



15. When corn sprouts^ what part is the first to appear above ground? 



16. When a bean sprouts, what part is the first to appear above 

 ground? W'hat is the second part? 



17. When a pea sprouts, what part is first to appear above ground? 



18. Wliat are the functions of the cotyledons? (tIvc illustrations. 



19. To what can we attribute the rapid germination of the seed? 



20. What are enzymes? 



21. Are enzymes found in the animal body? 



22. If so, name a few of them and give their functions. 



23. What do you mean by " seedling plant"? 



24. What is the function of the micropyle? 



25. What part of the seedling bean stem is the first to elongate? 

 2f>. Compare the cotyledons of the common bean and the castor oil 



plant. 



27. Describe the opening of the seed coats of the bean, castor oil plant 

 and other seeds. 



