GROWTH, 



69. Change from meristemir.atic to vacuolated cells behind the growing point 

 seen under the microscope. 





70. Region of elongation. Roots of germinating beans were marked on the previous 

 evening with equally-spaced ink lines. The greatest distance apart of these lines now 

 indicates the region of maximum growth. 



71. Effect of heat on growth. Compare the amount of growth of seedlings kept 

 at different temperatures. 



