title: An ultrastructural analysis of polyspermy in the surf clam, Spisula solidissima.
mesh_terms: D000818:Animals; D049872:Bivalvia / Q000502:physiology*; D002467:Cell Nucleus; D002843:Chromatin; D005260:Female; D005306:Fertilization; D007314:Insemination; D008297:Male; D008854:Microscopy, Electron; D008938:Mitosis; D009024:Morphogenesis; D010063:Ovum / Q000166:cytology; D013094:Spermatozoa / Q000166:cytology*
chemical_list: D002843:Chromatin