232 Regulation of Size in Unicellular Organisms 



and regeneration, 92 



and salts, 40 



and starvation, 36 



and variability, 49 



of nucleus, 174-180 



of population, 33-35, 127, 146 



rate of, 18-41, 198 



Host, influences of, sec Parasitic 

 relationships 



Individuality, 98, 194-196 

 Infection, age of, 61 

 Ingestion, 38, 166 



see also Cannibalism 

 Inheritance, 54-71, 76, 114 

 Internal characteristics, and size, 

 108-121 



Lag, of multiplication rates, 74 

 Light, 131 



see also Photosynthesis 

 Limits, to size, 13, 95 

 Locomotion, 13, 52, 163, 164-166 



power for, 164-166 



Mating, see also Conjugation 



assortative, 108-112 

 Mechanical factors in fission, 83 

 Metabolic products, 139-141, 145, 



155 

 Metabolic rates, see Turn-over, 



Oxygen consumption 

 Metabolism and size, 1 

 Minimum work, 194 

 Modifications, persisting, 57, 70 

 Monsters, formation of, 79-82, 



100-103 

 Multiplication rate, 72-79, 120 



see also Reproduction, Fission 

 Mutation, 116 



Nuclear-cytoplasmic ratio, 171- 



188 

 Nucleolus, 201 



Nucleus, multiplication of, 83, 86 

 number of, 65, 175-181. 199-205 



shrinkage of, 179 

 size of, 171-188, 201 

 Nutrition, see Food, Starvation 



Osmotic pressure, 74, 147-154 

 Oxygen, 74, 158-163 



consumption of, 108, 160-162 



Parasitic relationships, 61, 63, 



155-157 

 Parents, immediate, influences of, 



54, 57-58, 65, 69, 191-192 

 Permeability, 11 

 Photosynthesis, 77, 130 

 Plasmolysis, 150 

 Plastogamy, 98 

 Polyploidy, 199-204 

 Population, maximum, 140, 146 



growth of, 33-35, 127, 146 

 Power, for locomotion, 164-166 

 Pure line, see Clone 

 Pyrenoids, 202 



Race, see Clone 

 Radiations, 79, 102, 157 

 Ratio, nuclear-cytoplasmic, 171- 

 188, 199-205 

 surface-mass, 12-13, 158-170 

 Regeneration, 74, 92, 95 

 and growth, 92 

 and age, 96 

 Regulation of size, theories of, 



1-6, 70, 189-194 

 Reorganization, 74, 76 

 Reproduction, see also Multiplica- 

 tion rate 

 and growth, 77, 87 

 inhibition of, 56, 77, 88 

 lag in, 74 

 method of, 57, 64 

 Rhythms, of reproduction, 34, 117, 

 120 



Salts, see also Osmotic pressure 



and growth, 39 



effects of, 78, 81, 82 

 Sap, cell, 197 



