PHYSIOLOGICAL PROCESSES IN PLANTS 55 



5. Name the two best corn producing states. Wheat. Rice. 



6. Name some of the uses of Indian corn. 



7. What part have the cereals played in civilization ? 



8. Explain the statement made by J. Ogden Armour, " The 

 call of the farm must be made the answering cry to the wail of 

 the hungering city.' 7 



References 



Hunter, Essentials of Biology. Chap. IV. 

 Hunter, Elements of Biology. Chap. V. 



Gannett, Garrison, and Houston, Commercial Geography. Chap. IX. 

 Huntington, A. O., "Poisonous Vagrant Weeds," House and Garden, 

 September, 1909. 



PROBLEM X 



A study of seeds in their relation to the new plant. 



Materials. Kidney or lima beans soaked in water for 24 

 hours, dry pods of beans, vaseline, iodine solution, nitric 

 acid, ammonia, and demonstration microscope. 



INTRODUCTION 



Bean Pod and Bean 



Observations. 1. Find the ovary, style, and stigma. How 

 distinguish them ? 



2. Open the pods, and find the seeds. Where are they 

 fastened ? Note that each seed is fastened by a little stalk 

 (funiculus). 



3. Pull a bean from its attachment. Find a scar (liilum), 

 showing where the funiculus was attached. Where is it lo- 

 cated ? 



4. Look for a tiny hole (micropyle), near the hilum. 

 Conclusions. 1. What is one of the functions of a fruit ? 



2. Can you think of any function of the micropyle ? Keep 

 in mind that it leads to the egg cell. 



