Origin of Sexuality 293 



cause variation in their formation are diverse en^^ronment 

 or altered chemical nutrient materials. Both seem to be 

 inciting conditions alike in asexual cell formation, as already 

 discussed, and also in sexual cell formation. 



It must frequently have happened during mid-archsean 

 times that hosts of individuals of the same species of acaryote, 

 and as yet therefore asexual, organisms became exposed to 

 two or more different environal states. Thus one group may 

 have reached or been carried to areas in which a rich and 

 stimulating food supply existed around, while another may 

 have been carried to areas poor in such food. Two such diverse 

 regions at the present day might be a richly charged mineral 

 basin and a rather stagnant lake between an inflowmg and 

 outflo%ring river. Were individuals of a species able to sur- 

 vive in two such regions, all known facts indicate that altered 

 hnes of energy flow would be established, which would cause 

 one lot to diverge more or less from the other. The abundant 

 experimental results of Klebs {110) are here exactly apropos. 



Differences in energized tension alike of protoplasm and 

 of evolving chromatin would establish stereoenergetic placing 

 of molecules of diverse chemical nature. Were such action 

 so to continue as to affect the chromatin granules of each lot, 

 one of these might assume what we may call the positive state 

 of cognitic energizing, the other the negative state. Then 

 as on the physical principle of plus and minus electric attrac- 

 tion, of satisfied and unsatisfied chemical states, or of warm 

 and cold bodies, when these have developed under appropriate 

 environment they would show complemental stereoenergetic 

 bio-cognitic attraction. If it be here objected that we have 

 as yet no material basis for such view, it can well be replied 

 that, as in electric, cheniic, and thermic positive and negative 

 states, a satisfied or balanced condition results, when currents 

 of energy between the plus and minus bodies are established. 



In the daphnid or water flea Simocephalus Issakowitsch 

 showed that rich nutrition, and also high temperature, which 

 probably acts indirectly by influencing nutrition, caused the 

 production of parthenogenetic females, while starvation and 



