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Cell interactions: 



in Achlija, 35 



inductive, 81-84 



inhibitory, 86 



in slime molds, 31 



known mechanisms of, 86-91 



mass interactions, 80-81 



morphogenetic fields, 44-46 



synergism, 85, 88-89 

 Cellular slime molds (see Slime molds) 

 Central nervous system, 61, 63-64 

 Chemotaxis, 31 

 Chick embryo: 



cleavage, 55, 56 



gastrulation, 60 

 Chloroplasts, 10 

 Chorda-mesoderm, 82 

 Cilia, 14-15 

 Circulatory system, 61 

 Cleavage, 47, 55-57, 67 

 Cnidoblasts, 39 

 Coelenterates ( Cnidaria ) : 



general properties of, 37-39 



life cycle of, 39-40 



polymorphism in, 40-42 



regeneration of, 42-46 

 Collecting tubules, 85 

 Conjugation, 16-17 

 Cytology, 5 



Ectoderm, 60, 61 

 Egg, 50-52, 67 

 Embryogenesis: 



Amphioxus, 55, 56, 57-59 



chick, 55, 56, 60 



coelenterate, 40 



frog, 55, 56, 59-60 

 Endoderm, 60, 61 

 Enzymes, 67, 74, 88-89, 96 

 Epidermis, 40, 61 

 Escherichia coli, 74-75, 89-90, 

 Euglena, 74 



Exponential phase, 97-98 

 Extranuclear elements, 9 



Fertilization, 52-54 



Fission, 6, 15 



Fragmentation, 7 



Frog embryo: 

 cleavage, 55, 56 

 gastrulation, 59-60 

 later stages, 63 



Fruiting body, 25 



Deoxyribose nucleic acid (DNA), 



73-74, 88 

 Dermis, 61 

 Development: 



mosaic, 77 



regulative, 77 

 Developmental biology, 3 

 Dictyostelium discoideum, 27-33 

 Differentiation: 



definition of, 4, 77-79 



genetic basis of, 72-77 



of bristle cells, 70-71 



of coelenterates, 37-38 



of neural tube cells, 71-72 



of slime mold myxamoebae, 28-31 



specificity of, 72 

 Diplococcus pneumoniae, 88 

 Diploid, 11, 17, 22 



Gametes, 11, 48-52 

 Ganglia, 64 

 Gastrodermis, 40 

 Gastrula, 40, 57-62 

 Generation times, 99 

 Genetic changes, 2 

 Genetic information, 73-74 

 Genetic recombination, 11 

 Genotype, 75 

 Glands, 61 

 Gomjaulax, 18-21 

 Growth: 



equations for, 102-105 



exponential phase of, 97-99 



filamentous, 7 



fragmental, 7 



lag phase of, 96-97 



noncellular, 7 



