GERMINATION SEEDS, GROWTH SEEDLINGS 187 



do not allow water to stand around the seeds. Invert 

 other tin pans over these seed pans. Which seeds ger- 

 minate? Why? 



Prepare two pans of seeds as you did the second one 

 above. Place one pan out of doors in a cold place, and 



Courtesy of D. W. Worklrtff 

 FIG. 53. GERMINATING CORN SHOWING ROOT HAIRS 



leave the other in the house where it is warm. Note 

 the difference in the germination. Explain. 



2. To Show the Function of Cotyledons 

 Remove the two cotyledons of a germinating bean, and 

 insert the growing roots through a piece of mosquito 

 netting, tied over a tumbler into the water with which 

 the glass is filled. Insert another germinating bean 

 from which the cotyledons have not been removed. Note 

 the comparative growth of the two seedlings. Explain. 



