222 



Charles F. Ehret 



demand in the form of primary organelles (young nucleoli) < 0.5 [x in diameter.) 

 One interesting aspect of this scheme that is probably not artificial is that for 

 plant and animal cells in general, all subcategories have members, whereas for a 

 particular cell, such as Paramecium, numerous vacant categories exist (e.g., 

 0. 101 grana-eyespot). The latter condition, not the former, is the more common 



Digital 

 Code 



f fused^ 



solitary 



-,000 



.0001 



plas' 



Loo 



iITlIC ^. ._ 



packed" 

 interfacial 



Intranuclear 



(nucleo-cytoplasmic) 



©001 

 «01 



primary 

 organelle 



extranuclear 



H 



A packed 



plasmic 



Classical Name Reference 



Nucleolus (15) 



Small (young) 



nucleolus 

 Nucleolus (54, 15) 



Typical (large;old) 



nucleolus 

 [Virus] (40-46) 



Nuclear membrane (25:36-39) 



Mitochondrion (7-11) 



Sarcosome 55) 



Myogenic granule (55) 



Centriole (19) 

 Lipochondrion 

 Assorted granules 



Nebenkern (13) 



Dictyosome (14) 



Acroblast (14) 



Acrosome (14) 



Golgi apparatus (14,57) 

 Endoplasmic reticulum (16,57) 

 NissI substance 



Plastidgrana (16) 



Muscle fibers (55-58) 



Eyespot (59) 



Cilium (flagellum) (24) 



Axial fiber (60) 



Retinal rod ( 6) 



Stereocilium (10) 



Sensory bristle (27) 



Trichocyst (61) 



Cirrus complex (27) 



Peniculus-quadrulus (26) 

 Hexagon-rhombus (47) 



Ribbed wall (26) 



Brush border (23) 



Fig. 2. Organelle Decision Tree, representing a flow-diagram of the alternate 

 pathways and collisions available to a primary organelle in approacliing minimum 



uncertainty in a cell. 



situation in dichotomous divisions based upon a differentia and its negative (33). 

 The fundamentum divisionis for the first two divisions is location in the cell, and 

 for the next two divisions is location with reference to other organelles; it is 

 evident, however, that early organeller coacervation may influence the subsequent 

 localization of organelles, thereby upsetting the strict temporal representation 

 of the scheme. Whether such competitive mechanisms explain null-categories 

 in some cells, or whether we have simply failed to recognize the appropriate 

 candidates for these categories in the cells in question remains to be seen, and 

 of course both answers are plausible. It should be noted that the 'fusion' 



interfacial 

 (free cell border) 



solitary 



packed 



