376 Causes and Course of Organic Evolution 



(6) In l^oth, the same irritable phenomena of environal 

 stimulation, excitation period, resi)onse, proi)agation of 

 stimulus effect, (summation of stimuli), neutral period, 

 and frequent reexpansion are seen. 



(7) In both, the evolving chromatin ultimately forms 

 (Caryota) a nuclear and nucleolar structure for rapid 

 perce})tion of environal relations through activity of cog- 

 nitic associated A^dth biotic and lower energies. 



(8) In both, sexuality ^^-ith its most primitive expres- 

 sion conjugation, evolves pari passu with nuclear-nucleo- 

 lar evolution. 



(9) In both, the protoplasm or some constituent of it 

 elaborates like products as carbohydrates, fats, amides, 

 proteids, ferments, and additions to the protoplasm; and 

 also produces like secondary products as glucosides, alka- 

 loids, volatile oils, mineral excretions, etc. 



(10) In both, absorption of oxygen and liberation of 

 carbon dioxide occur during the respiratory act. 



(11) In both, evolving sexuality proceeds from the 

 production of asexual reproductive cells, and later con- 

 jugation of like cells, on to phases wheie one becomes 

 smaller and motile as a spermatozoid, and the other rela- 

 tively large and richly protoplasmic as the egg. 



(12) In ])oth, the fundamental phenomena during cell 

 division of the chromatin, and during chromatin rear- 

 rangement for fertilization, are the same. 



(13) In both, the egg and sperm structure (of Caryota) 

 agree, except in minor details of number and distribution 

 of cilia, relative size, etc. 



(14) In both, the egg on fertilization undergoes seg- 

 mentation into equal or unequal cells. 



(15) In both, the entire ontogeny of each organism 

 becomes condensed and locked up in one cell the egg, 

 ^NTth its needed and complimentary cell the s])erm. 



(10) In both, each new organism reproduces the blended 

 characters of both parents to a greater or less, usually to 

 a balanced, degree. 



