Acetabularia: 



life cycle of, 22-23 



morphogenetic specificity in, 25 



regeneration of, 23-24 

 Achlya: 



hormonal influences in, 35-36 



induction in, 81 



life cycle of, 33-34 



sexual development of, 34 

 Activation of eggs, 53 

 Aggregation of slime molds, 28 

 Amitosis, 9 

 Amphioxus: 



cleavage, 55, 56 



gastrulation, 57-59 

 Animal hemisphere, 55 

 Antheridia, 35 

 Archenteron, 57 

 Artificial insemination, 52 

 Autogamy, 17 



Basal granule, 9 

 Biochemical embryology, 66-68 

 I n d 6 X Biochemically deficient mutants, 88-89 



Binary fission, 6, 15 

 Biological clocks, 18-22 

 Blastomeres, 55 

 Blastopore, 59 

 Blastula, 40, 54-57 

 Blastular cavity, 55 

 Blepharoblast, 9 

 Brain development, 61 

 Bristle organ, 69-71 

 Brucella abortus, 86-87 

 Budding, 6 



Cell division: 



biochemical events in, 8 

 genetic aspects of, 8-10 

 varieties of, 6-8 



111 



