INDEX 



677 



Diaphragm, 74; 75 



Diapsid reptiles, 440, 442-453 



Diastase, 175 



Diastole of heart chamber, 93; 86 



Diatoms, 407, 597, 600-601 



Dicots, 134-135, 598, 621, 624-626; 622 



structure and functioning of, 134-176 

 Diet, 63-64 

 Diffusion, 13, 150 

 Digestion, 184-186 



in man, 64-72; 25 

 Digestive system, 185-186, 192; 183 



in man, 24, 64-72, 78 

 Dihybrid cross, 283-284; 285 

 Dinaric race, 517; 512, 516 

 Dinosaurs, 447-453, 631 

 Dioecious condition, 222-223, 268 

 Diploblastic characters, 235, 362, 627, 



629 

 Diploid, 219, 221-222, 254/;., 291-292; 

 217 



in sporophyte, 254, 256, 268, 273-274 

 Diplotene, 218; 217 

 Disaccharides, 56, 173 

 Disease, defenses against, 54, 99-102 

 Dispersal, 380-383 

 Distal, 144w. 



Distribution, factors involved in, 380-386 

 Division of labor, 11; 25 

 Divisions of plant kingdom, 135n., 193, 



596-598; 262 

 Domestication, 534; 504 

 Dominance, dominant, 281, 303; 285 



absence of, 302; 303 

 Dorsum, dorsal, definition of, 32». 

 Drift, 351-352 

 Drosophila, 291-292, 294-301, 314-316 



mutant types of, 314—315 



salivary chromosomes of, 31 3, 348 



sex determination in, 291, 292 

 Dryopithecus, 483-484; 485 

 Duckbill, 459, 632 

 Duct, 22 



Ductless glands, 103, 125-133 

 Dwarfs, cretin, 129 



pituitary, 128 



Pygmy, Negrito, 524; 526 



E 



Ear, 112-115, 360, 457; 185, 238 

 Ear size, inheritance of, 323 

 Early European race, 511, 528 

 Earth, age of, 336-337 



history of, 387-396 

 Earthworm, 183-186, 189-191, 647; 223 

 East Baltic subrace, 516 

 Echinoderms, 419, 629, 641-643; 594 



and chordate ancestry, 422 



Ecology, 541-586 



and human affairs, 589-591 

 Economies, food-gathering, 531; 530 



food-producing, 534-535; 530 

 Ectoderm, 235-237, 361, 627; 234 

 Egg, in animals, 221, 232; 220 



human, 242-244; 20, 247, 250 



maturation of, 219-221; 220 



parental care of, 227-230 



in plants, 257, 261, 271; 258-259, 270 



poles of, 231, 232, 235 



types of, 232 

 Elements, essential for plants, 147-148 



in protoplasm, 14 

 Embryonic adaptations, 367-368 

 Embryonic development, 230-240, 361- 

 364 



human, 252-253; 250, 251 



of plants, 139-140, 273-274; 258, 270 

 Embryonic membranes, 250-253, 438; 



439 

 Embryos, homologies in, 361-365 

 Enamel, 53 



Endocrine glands, 103, 125-133 

 Endocrine system, 26, 103, 125; 127 

 Endodermis, 145, 155; 144 

 Endolymph, 114 

 Endolymphatic duct, 113 

 Endosperm, 271, 273-274; 270 

 Endothelium, 84 

 Energy capture, 541-542 



zones of, 561 

 Energy cycle, 541-545 

 Enterokinase, 70m. 

 Enteron, 185-186; 183 

 Entoderm, 235-237, 361, 627; 234 

 Environment, biotic, 562-586 

 and gene expression, 316 

 and heredity, 316-319 



physical, 545-557 

 factors of, 553-557 

 Environmental resistance, 562-564 



biotic factors of, 564-568 

 Enzymes, 65, 137n. 



digestive, 65, 68-71 



inverting, 70 



in plants, 174-175 

 Eohippus, 466-468 

 Epidermis, of human skin, 49-50 



of plant, 143, 145, 153, 167; 144, 154 

 Epithelial tissues, 22 ; 20, 50 

 Equatorial plate, 19, 219; 18, 217 

 Erepsin, 68, 70 

 Ergosterol, 59 

 Erythroblasts, 83 

 Erythrocytes, 82; 20 

 Eskimoid race, 519; 512 

 Esophagus, 65, 185; 67, 75, 424 



