GENERAL BIOLOGY 



FIG. 175. Diagram of nuclear behavior in cell division (after 

 Wilson), a, resting stage between divisions; b, beginning of 

 d ; vision phenomena; c and d, formation of nuclear spindle 

 and fragmentation and split ting of chromosomes; e to;, later 

 stages, t, centrosomes; u, nucleolus; v, spireme; w. chromo- 

 somes"; *, x, asters ; y, chromosomes in equatorial plate ; z, 

 chromosomes separating. 



