title: "Indent" formation and mitotic delay of sea urchin eggs fertilized with X-irradiater sperms.
mesh_terms: D000818:Animals; D005260:Female; D005306:Fertilization; D008297:Male; D008938:Mitosis; D010063:Ovum / Q000166:cytology*; D011830:Radiation Effects; D012617:Sea Urchins; D013094:Spermatozoa / Q000528:radiation effects*; D013997:Time Factors