ROOTS 69 



LABORATORY EXERCISES. 



Exercise 1. Types of roots. Examine the fibrous roots of corn, grass 

 and clover; the fleshy roots of sweet potatoes, radishes and carrots, and 

 note their characters. 



Exercise 2. Origin and position. Examine a number of germinating 

 grains of corn and note origin and order of formation of the roots. 



Exercise S. Examine specially prepared longitudinal sections of root 

 tip of corn, onion or other plant. Note the axi^ cylinder, endodermis, 

 cortex, epidermis and root-cap. Also note the size and shape of the cells 

 in various parts. 



Exercise 4. Examine a cross-section of a root and note the same points 

 (•excepting root-cap ) . 



Exercise 5. Examine the root-hairs from roots of corn, okra or other 

 seeds that have been germinated between sheets of wet blotting paper. 



Exercise 6. Germinate seeds in loose soil: wet the soil thoroughly; pull 

 the seedlings carefully. Note the amount of soil clinging to the roots. 



