157 



A 



B 

 C 

 D 



E 

 F 



G 

 H 



I 

 J 



K 



Fig. 69. Diagram showing nuclear changes taking place during conjugation (A-P) and during 

 division (G-L) in Paramecitim. (After Jennings; by the courtesy of Richard Badger, Boston.) 

 The processes are identical in the members of the pair. 



Questions on the figure. — What happens to the meganucleus ? Trace the 

 behavior of the micronucleus throughout. In terms of the micronucleus, what 

 is the result of conjugation? When does the new meganucleus appear and what 

 is its origin? What conceivable values has conjugation? 



evidence that they learn by experience. They transmit their 

 native quaHties, but apparently not the results of accident, to 

 the individual body. 



