700 - Index 



Amitosis, 50 



Ammonia, 177 



Amnion, 389-90 



Amniotic cavity, 389, 390 



Amoeba, 20, 29, 34, 49, 61, 62, 116, 121, 122, 

 128-29, i:;o. 132, 195, 198, 575, 625 



Amoeba histolytica, 578 



Amoeboid movement, 94. 196-98 



AMP (see Adenosine monophosphate) 



Amphibia, 566, 567, 666, 667, 670-71 



Amphincura. 653 



Amphioxus, 281, 665. 666 



Ampholytes, 85 



Amplexns, 386 



Ampulla, 385 



Amvlase, 175 



Amvlopsin, 31 2 



Anabolism. 132 



Anal opening, 1 31 



Anal sphincter, 315 



Anal spot, 130, 131 



Anaphase, 45, 46 



Anatomy, comparative, 554-56 



Andalusian low], 481. 482-84 



Anderson, T. I'.. 523 



Anemia, 321, 347, 366 



Anesthesia, 46] 



Angiosperms, 216, 219-21, 619-21; life cycle of, 

 209, 216-28 



Angstrom, definition of, 20 



Animal cells, metabolic reactions of, 133-39; 

 nutrition of, 126-39 



Animal kingdom. 624-76; Annelida, 647-49; 

 Arthropoda, 654-60; Brachiopoda. 643-44, 645; 

 Bryozoa, 642-43, 644; Chordata. 664-76; cri- 

 teria, 624; Ctenophora. 634-35; Eclunodermata, 

 660-64: Moltusca, 649-54; Nemathelminthes 

 (Nematodes), 644—47; Ncrnertinea, 641; plant 

 kingdom and, 592-94; Platyhelminthes, 635-41; 

 Porifera. 629-30; Protozoa, 625-28; Rotifera, 

 641-42, 613 



Animal pole, 273 



Animal populations, food supply and, 574-75 



Annelida (segmented worms), 647-49; character- 

 istics of, 647-49; classes of, 649; relationship to 

 other phyla, 619 



Annual rings, 248 



Anodonta cataracta, 197 



Anterior lobe, pituitary gland. 409, 410; hormones 

 of. 410-12 



Antheridia, 212 



Anthozoa, 633-34 



Antibiotics, 176 



Antibodies, 180, 320; production of 335-37 



Anticoagulants, 325 



Antigen, 320 



Antisera, 579 



Anus, 283, 387 



Aorta, 327, 329, 330, 331 



Aortic arches, 330, 331, 332 



Apical cell, 228, 238, 210, 241 



Apoenzyme, 104 



Appendix, 311, 314, 554 



Arachnida, 655 



Arbaeia punctulata, 199 



Arehaeoptcryx, 568. 569 



Archegonia, 205. 212. 610, 611 



Archenteron, 278 



Archeozoic era, 186, 563, 564, 565 



Archiannelida, 649 



Argenine, 312. 342 



Anion, D., 161 



Arteries, 327. 328; of human body. 331-32 



Arterioles. 329 



Arthropoda. 654-60; adaptations to land condi- 

 tions by, 657-68; Arachnida, 655; characteristics 

 of. 654^55; Chilopoda, 655-56; classes of, 655- 

 57; Crustacea , 655: Diplopoda, 655-66; Insecla, 

 655; invasion of land by, 657; Onychophora, 

 656, 657; Trilobita, 654, 656-57 



Artificial selection, 516-17, 512 



A Minis. 273 



Ascoearp, 605 



Ascomycetes (sac fungi), 604-06 



Ascopores. 605 



Ascorbic acid, 347. 349 



Asexual reproduction, 55-57, 203; binary fission, 

 55-56; budding, 56; heredity in relation to. 

 499-501: multicellular animals. 393-96; sporu- 

 lation. 56-57 



Asparagine, 135 



Aspergillus, 174, 604 



Asphyxia, 366-67 



Asphyxiation, 132 



Aslcroidea, 663 



Asters, 28, 43 



Athlete's foot, 607 



a-tocopherol, 349 



Atomic numbers. 70 



Atoms, electronegative, 70; electropositive, 70; 

 molecules vs., 67-68; structure of. 69-71 



ATP (see Adenosine triphosphate) 



Aureomycin. 176 



Auricle. 294 



Autocatalysis, 110-11 



Autosomes, 497, 498, 507 



Auxins, 262-63; characteristics of, 264-65; im- 

 portance of, 267 



Avery, O. T„ 520 



Aves (birds), 667, 672-73 



Avitaminoses, 347 



Axial filament, 273, 274 



Axoloti, 401 



Axons, 287. 288, 453 



