114 Index 



Sexual reproduction, 11 

 Siamese twinning, 82 

 Sirenin, 35 

 Slime molds: 



cellular differentiation in, 28-31, 33 



cellular interaction in, 31, 33 



life cycle of, 27-28 



regulation in, 32 

 Somites, 58, 61 

 Spemann, H., 82 

 Sperm, 48, 67 

 Spinal cord, 62 

 Sporangia, 33 

 Stationary phase, 99-100 

 Stern, C, 69 

 Surf ace- volume ratio, 101 

 Synergism: 



growth, 88-90 



inductive, 85 



Tissue culture, 92 

 Transformation, 88 



Vegetal hemisphere, 55 



w 



Weissman, A., 76 



Yeast, 10-13 

 Yolk, 50 



Tetrads, 49 

 Tissue, 37 



z 



Zygote, 11, 35 



