708 - Index 



Gall bladder, 311, 313 



Gall stones, 313 



Galvanoeffcctors, 441 



Gametes, 57, 58, 59, 60, 61, 271, 380, 514; matura- 

 tion of, 476-79 



Gametogenesis, 476-79 



Gametophyte generation, 212 



Gametophytes, 62, 203. 204-05, 207, 208. 209, 

 212, 215, 219-21; significance of. 221 



Ganglia, 288, 451; collateral. 467; lateral, 467; 

 parasympathetic, 467 



Garrod. A., 505 



Gases. 67, 71; in the protoplasm, 75 



Gastric glands, 296, 298. 299, 303 



Gastric juice, 130, 296, 303, 305-08; composition 

 of, 305-06; flow of, control of, 306-08; func- 

 tions of, 306 



Gastric lipase, 103 



Gastrin, 307. 308 



Gastropoda, 653 



Gastrovascular cavity, 293 



Gastrula. 278 



Gastrulation, 277-78, 531, 535 



GDH (see Growth and differentiation hormone) 



Geiger counter, 142 



Gelation, 94-95 



Gelidium, 601 



Gels. 94-95 



Generation, gametophyte, 212: spontaneous, 186: 

 sporophvte, 61, 216, 212 



Generations, alternation of. 203 



Generator potentials. 428, 429, 456 



Genes, 10, 50. 483; allelic. 484, 509. 512; comple- 

 mentary, 190; concept of, 526; deoxyribonucleic 

 acid (DNA) as genie material. 521-25; DNA- 

 RNA-protein interrelationships. 525-26; domi- 

 nant. 484; enzymatic nature of. 110-11; experi- 

 mental embryology, 531-36; genetic code, 526. 

 527; hormones, genie determination of, 536; 

 localization of. in the chromosomes, 493-95; 

 mutation, basic nature of, 526-29; nature and 

 mode of action, 520-36; role in development, 

 529-31; sex-differentiating, 497; sex-linked, and 

 characters, 498-99; supplementary, 490 



Genetic code, 526, 527 



Genetics, 475; natural selection and, 548-49; pop- 

 ulation, 504-05 



Genie effects, multiplicity of, 503-04 



Genie materials, 5 



Genotype, backcrossing to determine, 486-87; 

 phenotvpe vs., 484-87 



Genus, taxonomic category, 593 



Geological strata, relative ages of, 562-70 



Geological time, eras and periods of, 564, 565 



Geotropism, 263 



Germ cells. 380: continuity of, 476-80; gametes, 

 maturation of. 476-79 



Germination, seed, 222, 224, 225; seed plants, 

 231-32 



Gibberellins, 265 



Gill clefts, 280 



Gill slits, 283 



Gills. 326. 358, 654 



Ginkgo biloba, 619, 620 



Gizzard, 296 



Gland cells, 35, 285 



Glands. 199. 286; adrenal, 398, 406-08; calci- 

 ferous. 296; Cowper's, 385; as effectors, 431, 

 440-41; endocrine, 383. 398-417; gastric, 296, 

 298, 299, 303; intercerebral, 417; intestinal, 297, 

 298, 310: lymph nodes, 334-35; mucous, 298; 

 multicellular, 296; parathyroid, 398, 403, 405- 

 06; parotid. 300. 301; pineal. 398, 412, 413-14; 

 pituitary, 398, 409-13; prostate. 384, 385: pro- 

 thoracic, 415; salivary, 298, 300-03; sinus, 417; 

 structure of, 286; sublingual. 300, 301; sub- 

 maxillary. 300. 301; thymus. 335-37, 398, 414: 

 thyroid, 34 4, 398, 402-05; unicellular digestive, 

 296 



Glandular cells, 2tf.~> 



Globulin, antihemophilic. 324 



Glomerulus, 372 



Glottis, 303 



Glucokinase, 101. 119 



Glucose, 76, 77, 79. 80, 88. 121. 170, 417; blood 

 level of. regulation of, 341; dehydration syn- 

 thesis, 79; hydrolysis, 79; oxidation of, 78; pro- 

 toplasmic fuel, 77-78; sugar conversion to, 340- 

 41; synthesis of other carbohydrates from. 78- 

 79 



Glycerol. 81. 82, 340 



Glycogen, 76, 80. 137. 150-51, 341. 435-36 



Glycolysis. 149 n., 150-51. 435-36 



Glycoproteins, 88 



Glycosuria, 341 



Goblet cells, 298 



Goiter, colloid, 404: endemic. 404: exophthalmic, 

 405 



Golden-brown algae (sec Algae) 



Golgi bodies, 29 



Gonadotrophins, 410 



Gonads, 380, 383; origin of. 284 



Gonia, 476 



Gordon, A. S., 413 



Graafian follicle, 387, 401, 402, 411 



Gracilarla, 601 



Grafting. 233, 234 



Grana, 28, 159, 160 



Granules, 31 



Granulocytes, 322 



Grasshoppers. 655, 658 



Grave's disease, 405 



Gravity as abiotic environment, 584 



Green algae (see Algae) 



