1504 LIFE : OUTLINES OF GENERAL BIOLOGY 



climbing plants, 167 

 grouping of, 167 

 "chimaera", 470 

 cleistogamy, 187 

 coal-making forests, 835 

 co-education, 576 

 colloidal protoplasm, 13 

 colloids, 13 

 colony — 



forming, 113 



gradations, 115 



of Volvox, 875 

 coloration — 



protective, 417 



structural, 417 

 colour — 



change, 420 



meaning of, 408 



of the hair, 431 



response, 49 



uses of, 416 



vision in animals, 245 

 colours — 



. complementary, 409 



in organisms, 410 

 commensals, 139 

 conditioned reflex, 240, 1000 

 connective tissue, 697 

 consanguinity, 471 

 contraction of muscle, 237 

 convergence, definition of, 680 

 co-operative regime, 1309 

 Copernican theory, 1379 

 corporate activity among animals, 110 

 corn, 1 181 

 corpus luteum, 299 

 correlation — 



of organisms, 106 



of variations, 1098 

 correspondence schools, 1373 

 cosmic Becoming, 1 103 

 cosmic evolution, 1 103 

 cosmic process, 1103 

 cosmodrama, 141 8 

 cosmosphere, 646, 1240 

 courtship — 



among animals, 509 



ceremonial, 1023 



ceremonies, purpose of, 1027 



habits, 1027 



of spiders, 513 



utility of, 1026 

 counting by animals, 603 

 cranial capacity, 570 

 creative art, 1421 

 creative evolution, 957 



cretaceous period, 841 

 cretinoid, 1207 

 Cro-Magnon, 11 75 

 cross-pollination, 190, 192, 193 

 crossing of true-breeding strain, iioo 

 crossing over, 728 

 "crossing over" of gene groups, 981 

 crystals, growth of, 31, 32 

 cultivated plants, significance of, 1181 

 culture of existence, 1367 

 curve of frequency, 1008 

 customs, appearance of, 11 62 



Damage by parasites, 149, 150 

 daphnids, 57 

 Darwin, 1454 

 Darwinian theory, 1080 

 Darwinism, 1016 



or design, 1080 

 Darwin's works, significance of, 1458 

 death — 



beauty of, 1375 



biology of, 805 



natural, 807, 861, 862 

 deep-sea life, 83 

 deep-sea world, 84 

 dentition in carnivores, 1076 

 determination of sex, 535 

 development — 



arrest of, 926 



of higher functionings, 1367 

 differential fertility, 1272 

 differential fertility, cause of, 1273 

 differential growth, 170 

 differential mating, 1023 

 differentiation, epidermic, 675 

 differentiation in animals, 672 

 digestion, 317, 342 

 digestive juices, 343 

 dimorphic reproductive cells, 536 

 dinosaurs, 830 



puzzle of, 832 

 dirigible dog, 629 

 dispersal of seeds, 193 

 distemper, conquest of, 1281 

 divergence — 



of animals, 848 



of plants, 848 

 division of one-celled organisms, 451 

 domesticated animals, 901 

 domesticated mammals, 932 

 domesticated sheep, 930 

 dominant character, 1447 

 dominant factors, 193 

 dramatic aspects of life, 141 8 

 drifting of continents, 889 



