340
TOPICAL INDEX
Ribonucleic acid, 85, 95, 103, 274, 278
Ribosomes, 167, 282
Root
primordia, 76
vascular tissue, 64
S
Sea urchin, eggs of, 221ff. see also Eggs,
Fertilization, Membrane
structure, differentiation, and fertilization, 222
summary of changes accompanying
fertilization, 316
Spermatozoa, attachment to sea urchin
egg, 259, 263
Spinal cord
neurons, 196
structure, 208
Stratum granulosum, of amphibian optic
tectum, 194
Stratum moleculare, 194
Synapses, 211
Τ
Tannin, effect on vitelline membrane, 297
Tectum
neurons, 185
structure, 194
Temperature, effect of
on barb ridges, 19
on fertilization, 299
on liver hypertrophy, 106
on root initiation, 78
Templates, in growth control, 97
Theca, 133
Thymidine, in growth rate measurement,
102
Thyroidectomy, 112
Thyroxine, effect on hypertrophy, 106,
112
Tissue culture, 52, 67
Tissues, in animal growth, 102
Tracts, feather, 3, 10
Trypsin, effect on fertilization, 223, 260,
273, 282, 296
U
Ultrastructure of cytoplasm, in amphibian egg, 131
Ureters, 113
V
Vacuolar apparatus, 168, 174
Vascular tissue
initiation, 62
primary, 65
secondary, 63
in tissue culture, 67
Vesicles, 157, 174
cytoplasmic, 166
endoplasmic, 301, 316
Villi, in amphibian eggs, 139, 143
Vitelline membrane, 22Iff.
penetration by spermatozoa, 259
separation from plasma surface, 264,
280
structure, 222
summary of changes in fertilization,
316
X
Xylem formation, 62, 66
Y
Yolk, of amphibian eggs, 145
Yolk nucleus, 151, 164
Yolk platelets, 158
formation and development, 168
utilization, 172
Ζ
Zona pellucida, 135, 139, 142
Zona radiata, 133, 135, 139
Zygote, physiological isolation of, 59