_ 37 ZEA. 



73. Histology of Root. Draw a transverse section of the root under both powers, 

 showing : piliferous layer with root hairs ; exodermis ; cortex with thick-walled outer and 

 thin-walled inner cells ; endodermis ; central cylinder, consisting of pericycle, phloem 

 and xylem with vessels and parenchyma. 



74. Origin of Lateral Root. Draw a prepared transverse section of a root showing 

 the origin of a lateral root from the pericycle. 



