290 CELL INTELLIGENCE THE CAUSE OF EVOLUTION 



is dependent on the presence in the body of the sexual 

 glands." 



You will notice that it is the same also with these sex 

 characters. They are not produced unless necessary. 

 The history of the human race shows that man battled 

 with his fellow man for the possession of the female and 

 in this battle it was an advantage to employ these mascu- 

 line characters. It is also plain that it was a method of 

 preparedness, both offensive and defensive, instigated by 

 the sexual cells as soon as they felt ready to possess or 

 defend a female. We find that if the instigators are re- 

 moved no sexual characters are developed. 



In insects we have the most wonderful illustration of 

 the tearing down or destruction of one structure and with 

 the same material rebuilding it into a new and different 

 structure. For instance, the cells first build a caterpillar 

 or worm ; this worm as a structure is demolished by those 

 same cells who put it up and a new and different struc- 

 ture is put up with the same material, known as a moth 

 or butterfly. In some other cases, if the worm is cut in 

 two, each half will be torn down by its occupants and the 

 half will again be rebuilt into a complete worm, but each 

 worm will be only half the size by reason of the lack of 

 material. There is nothing mysterious about this because 

 the structure is of no use as it is, so the only thing to do 

 is to tear it down entirely and rebuild it. Man would do 

 the same thing if someone cut away half of our house and 

 we had no other material to fix it with, the only thing to 

 do would be to tear it down entirely and with the mate- 

 rial build a smaller one. Wilson has the following to say 

 on this subject : 



"Morgan's remarkable observation on 'planaria' finally 

 shows that here also when the animal is cut into pieces, 

 complete animals are produced from these pieces but 



