36 BOTANY 



thickening appears along the equator of the thread-like 

 striations, and these gradually fuse together and separate 

 by a wall the two groups of bent rods that went to the 



FIQ. 5. _A series of simplified diagrams to show some of the most important 

 stages of the process (called mitosis) through which a nucleus passes in its 

 division to form new cells. In 1 the chromosomes are in a tangled skein, 

 in 4 they are separately seen as curved, horse-shoe like loops at each end 

 of the nuclear spindle. 6 shows the two nuclei of the daughter cells 

 settling down to the normal, and the wall nearly completed between the 

 results of the division. In rapidly growing tissue (such as root tips) these 

 cells will quickly grow to the size of 1, and then go through the procesg 

 again. 



two poles. At the poles these rods intertwine and unite to 

 form a long tangled thread once again, and this reverts 

 to the condition it was in in the original nucleus, and 

 VTQ see a granular mass with nucleoli at each pole. 



