Aiiaholism and Specialisation. 213 



by an increasing tendency to stability in the products of 

 anabolism, and, consequently, the protoplasm of the growing 

 points retains a greater instability than the specialised cells 

 of the niaturer members, and that this tendency to stability 

 increases until it destroys the vitality of the cell. 



3. That high feeding hastens this specialisation towards 

 stability, and, on the other hand, diminished feeding and 

 the presence of organic substances which excite kata holism 

 retard the specialisation along these lines. 



4. That a large size is acquired by plants owing to high 

 nutrition favouring the stable type of specialisation, the 

 living parts of the plant using the over-specialised and dead 

 cells as a means of attaining bulk and extent. 



5. That the specialisation in animals has been dominated 

 by an increasing tendency to instability in the products of 

 anabolism, and, in consequence, the vital processes are always 

 accompanied by a more or less pronounced katabolism. 



6. That over-nutrition tends to retard this form of 

 specialisation, an optimum-minimum of nutrition and the 

 presence of organic substances which excite katabolism 

 tending to promote it. 



7. That this instability of the products of anabolism 

 increases in accordance with the specialisation, during the 

 life of the individual, till katabolism gets the upper hand 

 of anabolism, with the resulting death. 



8. That a large size is attained in animals through high 

 nutrition retarding the unstable type of specialisation, and 

 in the higher forms in particular, large size can only be 

 acquired by forcing the nutrition during that period of 

 development in which the form of anabolism has not yet 

 attained a high degree of specialisation. 



9. That the isolation of in-breeding and continued asexual 

 forms of reproduction, and also that brought about by the 

 analytical separation by natural selection, by causing 

 specialisation of the two diverging forms of anabolism, tends 

 in course of time to extinction. 



10. That the segregative effects of conjugation, crossing^ 

 and cessation of natural selection, tend to foster that form 

 of anabolism which leads to growth without specialisation. 



