Index - 705 



Deplasmolysis, 120-21 



Desaturntion, 343 



Desmids, 596, 597 



Destructive metabolism, 137-38, 354-55, 343-45; 

 in green plants, 170 



Detergents, 313 



Determination, 533-34 



Deuterium, 142 



Deuleromycetes (imperfect fungi), 607 



Development, embryonic, 277-80; genes in, role 

 of, 529-31; mechanics of, 531; multicellular 

 plants, 228-34 



Devonian period, 563, 565 



Diabetes insipidus, 376, 412 



Diabetes mellitus, 408 



Diapause, 417 



Diapedesis, 322 



Diaphragm, 311, 312, 360 



Diatoms, 597-98 



Dicolyledoneae, 621 



Dicliostelhim, 36, 533 



Didinium, 576, 628 



Diet, balanced, metabolism and, 343-54: construc- 

 tive metabolism, 345-54; destructive metabo- 

 lism, 343-45; energy requirement, 343-45; in- 

 organic requirements, 345; organic require- 

 ments, 346 



Difflugia, 625 



Diffusion, 113-15, 133; free, 114; law of, 114 



Digestion, 128, 129-30, 313 



Digestive enzymes, 102-03 



Digestive glands, 296 



Digestive system, 278, 279; development of, 283- 

 84; gastric vacuoles, 291-92; in man, 296-316; 

 in multicellular animals, 291-96; saccular sys- 

 tems, 292-95 



Digestive tract, structure of, 297-98; tubular, 

 295-96 



Dinoflagellates, 598 



Dinosaurs, 561, 568, 671 



Dintzis, H. M„ 135 



Diphenylurea, 265 



Diphosphopyridine nucleotide (DPN), 145 



Diplodociis, 561 



Diploid cells, 52; origin of, 52 



Diploid phase of life cycle, 61 



Diploidy, 50-51, 203; in higher plants, 205-07, 

 208 



Diplomycelium, 211 



Diplopoda, 655, 656 



Direct calorimetry, 343 



Disaccharases, 314 



Disaccharides, 79-80 



Disc flowers, 225, 227 



Disease vectors, 581 



Diseases, artificial defenses, 579-81; clubroot, 603; 

 coccidial. 628; deficiency. 317; elephantiasis, 



646, 647; Grave's, 405: infectious, 578. 580; 

 mosaic, 8; natural defenses, 578-79; parasitic, 

 578-81; powdery-scab, 603; red-water fevers, 

 628; resistance to, 578-81; trematode, 638-39. 

 See also under name of disease 



Dispersion medum, 71 



Dispersions, diphasic and multiphasic, 93 



Dissociation, of water, 73; water in relation to, 

 72-73 



Distribution (in nutrition), 128, 131-32; of or- 

 ganic substances in plants, 253; in unicellular 

 plants, 168-69 



Division of cells (see Cell division) 



Division furrow, 45, 47 



DNA (see Deoxyribonucleic acid) 



Dopa oxidase, 530 



Dorsal aorta, 330, 331 



Dorsal blood vessel, 326, 327 



Dorsal lip of blastopore, 534-35 



Dorsal root, 461 



DPN (see Diphosphopyridine nucleotide) 



Drosophila melanogaster, 51, 481, 489, 490-99, 

 503, 511, 512, 529: multiplication of, 540 



Drugs, plant products as, 257 



Dryopteris marginalis, 204 



Dubois, R., 442 



Ducts, 243, 244, 245, 246, 247; excretory, 370; 

 oviducts, 381: sperm, 381; thoracic, 340; vasa 

 efferentia, 383, 384 



Dugesia dorotocephala, 294 



Duodenum, 310, 311; relations to liver and pan- 

 creas, 311 



Dutch elm disease, 604 



Du Vigneaud, V., 412 



Dyes, 22, 28,29, 31, 74 



Ear, structure of human, 425 



Earthworms. 647. 649; blood vessels of, 327; cop- 

 ulation of, 382; excretory process of, 371; nerv- 

 ous system of, 451-53; tubular digestive tract 

 of, 295-96 



Ecdysis, 417 



Ecdysone, 417 



Echinodermata, 660-64; characteristics of, 660- 

 63; classes of, 663-64; relationship to other 

 phyla, 664 



Echinoidea, 663 



Ecological succession, 589-90 



Ecological systems (ecosystems), 587-90; imbalance 

 in. 589; succession in, 589-90 



Ecology, 544; evolution and, 573-90 



Ecosystems (see Ecological systems) 



Ectocarpus, 599. 600 



Ectoderm, 278. 279, 284 



Ectoparasites, 178 



