CHAPTER VII. 



THE ANTAGONISM BETWEEN DEVELOPMENT AND GENESIS, 

 ASEXUAL AND SEXUAL. 



§ 343. By Development, as here to be dealt with apart 

 from Growth, is meant increase of structure as distinguished 

 from increase of mass. As was pointed out in § 50, this is 

 the biological definition of the word. In the following sec- 

 tions, then, we have to note how complexity of organization 

 is hindered by reproductive activity, and conversely. 



This relation partially coincides with that which we have 

 just contemplated ; for, as was shown in § 44, degree of 

 growth is to a considerable extent dependent on degree of 

 organization. But while the antagonism to be illustrated in 

 this chapter is much entangled with that illustrated in the 

 last chapter, it may be so far separated as to be identified as 

 an additional antagonism. 



Besides the direct opposition between that continual dis- 

 integration which rapid genesis implies, and the fulfilment of 

 that pre-requisite to extensive organization — the formation of 

 an extensive aggregate, there is an indirect opposition which 

 we may recognize under several aspects. The change 



from homogeneity to heterogeneity takes time; and time 

 taken in transforming a relatively-structureless mass into a 

 developed individual, delays the period of reproduction. Usu- 

 ally this time is merged in that taken for growth ; but certain 

 cases of metamorphosis show us the one separate from the 

 other. An insect, passing from its lowly-organized cater- 



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