S06 



IV. THE PRINCIPLES OF LIFE PHENOMENA 



Extensive 



stimulus 



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Fig. 29 

 Diagram of amoeboid movement. 



organisms which would move purposefully were able to continue their 

 existence. 



The property of protoplasm protein to contract and expand exces- 

 sively not precisely responding to the degree of stimulus must be 

 required for the m.ovement, such as amoeboid one and oscillation of 

 cilia or flagella, and organisms which need movement must have the 

 protein having such a property. If movement was favourable for 

 certain organisms, this property would be developed in them, since 

 the more developed the property, the organisms would become the more 

 fitted and the more easily win the struggle for existence. 



Monne (145) claimed that folding and unfolding of polypeptide 

 chain seem to be the essential features of the protoplasm, and he 

 stated that mobility and contractibility, which are due to active fold- 

 ing of polypeptide chains, are no doubt the characteristic life pheno- 

 mena of all living fibrils. This view is quite compatible with the 

 writer's. 



