THE CELL AND PROTOPLASM. 



107 



of carrying on their life activities for a while. 



The pieces of the cell which contain the nucleus 



of the original cell, or even a part of it, are 



capable of carrying on all its life activities 



perfectly well. In Fig. 24 is shown such a 



cell cut into three pieces, each of which con- 



tains a piece of the nucleus. Each carries on 



its life activities, feeds, grows and multiplies 



perfectly well, 



the life pro- 



cesses seeming 



to continue as 



if nothing had 



happened. 



Quite different 



is it with frag- 



ments which 



contain none of 



the nucleus 



(Fig.25). These 



fragments (1 



and 3), even 



though they 



may be com- 



Earativelv 

 % 

 irge masses OI 



protoplasm, are 

 incapable of 



carrying on the functions of their life continu- 

 ously. For a while they continue to move around 

 and apparently act like the other fragments, but 

 after a little their life ceases. They are incapable 

 of assimilating food and incapable of reproduc- 

 tion, and hence their life cannot continue very 



each 



containing a bit of the nucleus. Each con- 

 tinues its life indefinitely, soon acquiring 



the form of the ^ n&l as at c - 



