INDEX 



557 



Chaparral, 468 (fig.) 



Character expression of genes, 381 



Characters, acquired, 358; com- 

 bination, 359; heritable, in man, 

 ^ 506; independence of, 359; 



physical, of man, 506; physical, 

 of ocean, 482; secondary sexual, 

 174, 308 



Characteristics, emotional human, 

 539; intellectual, 534 



Chemical adjusters, 170 



Chemical correlation in animals, 

 171; in plants, 170 



Chemical injury, 210 



Chemical regulation, 169, 327 



Chemical sense, 139, 141 (fig.) 



Chemotropism, 111 



Chewing, 96, 133 



Child mortahty, 547 



Chih saltpeter, 272 



Chinese race, 527 



Chlamydomonas, 22 (fig.) 



Chlorophyll, 23, 40; pigments, 40 



Chromatin, 20 (fig.), 286 



Chromatophores, 40 



Chromosomes, 287, 353; conjuga- 

 tion of, 344; contain the genes, 

 353; history of, 342; individu- 

 ahty of, 289, 300; in pairs, 291; 

 movement of, 288; random' as- 

 sortment of, 311; reduction of, 

 311, 342; segregation of, 342; 

 splitting of, 288 



Cilia, 27 (fig.), 120 (fig.) 



CiHary motion, 119 



Circulatory system of higher ani- 

 mals, 87 (fig.) 



Class, 413 



Classes, occupational, 522; social, 

 522 



Classification, 411 



Clostridium, 275 



Clothing, 535 



Coagulating enzyms, 68 



Coagulation of blood, 88 



Coefficient of correlation, 517 



Cold-blooded animals, 79, 140 



Colds, catching, 224; common, 

 223 



Colloids, 45, 49, 52 



Colonial organisms, 27 



Colonies, bee, 194 



Color, perception of, 146 



Color bUndness, 146, 513 



Colors of animals, 440; of physio- 

 logical value, 442; protective, 

 441 (fig.); warning, 443 



Combat, the impulse to, 551 



Combinations of characters, 359 



Commensalism, 196 (fig.) 



Commercial success, 552 



Communities, defenses of against 

 disease, 234 



Comparative anatomy, 414 



Competition, industrial, 552 



Complementary genes, 386 



Conjugation, of chromosomes, 26 

 (fig.), 310 (fig.), 344; of one- 

 celled organisms, 301 



Connecting nerve-cells, 155 



Consciousness, 165, 186 



Conservation of energy, 78 



Contact, reaction of plants to, 113; 

 receptor, 153; senses, 139 



Contamination, of air, 235 of 

 water and food, 235 



Contractile vacuole, 26, 103 



Convergent adaptations, among 

 animals, 431; among plants, 432 



Cooperation, 546 



Cork, 56 



Correlation, chemical, in animals, 

 171; chemical, in plants, 170; 

 in metazoa, 149; in plants, 117; 

 in protozoa, 148; mechanism of, 

 118 



Corn, 386, 393 



Corpuscles, red, 88; white, 88 



Correns, C, 351 



Corti, B., 14 



Cotton, 393 



Cotyledons, 341 



Crabs, hermit, 196 



Cretmism, 183, 513 



Cro-Magnon man, 497 (fig.) 



Cross, 349 



Crossing-over, 374 (fig.) 



Crown-galls, 212 



Crystalline lens, 146 



Cultivation, effects of, 274 



Cumulative genes, 387 



Curd, 264 



Cuttings, 117 



Cycle, carbon, 277; energy, 279; 

 nitrogen, 277; phosphorus, 279; 

 sulphur, 279 



Cytase, 265 



Cytoplasm, 20 (fig.) 



