288 CELL INTELLIGENCE THE CAUSE OF EVOLUTION 



osition is true to a certain extent, that is, if it is a cold 

 climate the length of the hair will be long; if it is warm, 

 it will be short. In the same way man will vary his 

 houses and his bodily covering as to best serve his needs, 

 but to say that it is the climate that puts up the house 

 or makes the coat and puts it on the man's back is simply 

 absurd. It is the intelligence and industry of man that 

 makes the coat and builds the house. In precisely the 

 same way, if it is necessary, the cell communities are able 

 to change or vary the structure. Regarding this matter 

 Walker states : "The action of the environment upon an 

 organism has been claimed by some writers as the cause 

 of variation in its offspring. In considering this question, 

 it is necessary to have a very clear idea of what it means. 

 We have seen that the environment may produce very 

 great modifications in the individual. These modifica- 

 tions are acquired characters and appear in the individual 

 at different periods of its life in response to stimuli from 

 without. They are not inborn characters and unless the 

 necessary stimulus is applied they will not appear." You 

 notice his statement that if these modifications are not 

 necessary, they do not appear. In the case of man, if he 

 does not use the shovel and the hoe, but only the pen, the 

 inside of his hand will be nearly as soft as any other part 

 of his body. However, if he should change his occupa- 

 tion, the inside of his hand will develop a thick horny 

 covering. Why? Because if the skin cells inside of his 

 hand did not build up these buffers, the spade handle 

 would very soon cut through the skin and tendons and 

 destroy the hand. The evolutionist will say that the work 

 and the spade handle provided for and built up those 

 callouses in the man's hand. The climate will not build 

 hair or make a coat nor will the spade handle build a 

 horny covering to protect the inside of the man's hand. 



