VI. SEEDS 



33. PARTS OF A SEED 



Object. To find out the parts of a seed. 



Apparatus. Beans, peas, squash seeds, castor beans, horse- 

 chestnuts, or any other large seeds. 



Method. Examine the seed and note its color, surface, 

 and markings. Look for a scar (the hilum) which shows 

 where it was attached to the inside of the fruit. Look 

 for a small swelling (the chalaza) which is sometimes seen 

 on the outside of seeds. Look for the ridge (raphe) which 

 runs around some seeds. Look for a tiny hole (micropyle) 

 which penetrates the shells of some seeds. Describe and 

 draw the outside view of each seed studied and name all 

 parts shown. 



Conclusion. In one sentence state the parts which you 

 find common to all the seeds examined. 



34. EFFECT OF SOAKING 

 Object. To find out the effect of soaking seeds. 



Apparatus. Several dishes or bottles, water, and an assortment 

 of seeds, as beans, peas, etc. 



Method. Examine the seeds, noting the size and feeling 

 of the testas. Then place them in bottles and cover them 

 with water. Examine from time to time for several hours. 

 What change first takes place? Where does this change 

 begin? How do you account for this ? How does it spread ? 

 EXP. EOT. 4 49 



