Reactions of the sea urchin oocyte to foreign spermatozoa.
D000818:Animals; D000845:Annelida; D049872:Bivalvia; D002462:Cell Membrane; D002467:Cell Nucleus; D005260:Female; D005306:Fertilization; D008297:Male; D008540:Meiosis; D010063:Ovum; D010587:Phagocytosis; D012617:Sea Urchins / Q000196:embryology*; D013094:Spermatozoa / Q000166:cytology