title: Interspecific fusion of sea urchin eggs. Surface events and cytoplasmic mixing.
mesh_terms: D000371:Agglutination; D000818:Animals; D002459:Cell Fusion; D002462:Cell Membrane / Q000648:ultrastructure; D002467:Cell Nucleus / Q000502:physiology; D003584:Cytological Techniques; D003593:Cytoplasm / Q000648:ultrastructure; D005260:Female; D008938:Mitosis; D010063:Ovum / Q000166:cytology*; D012617:Sea Urchins; D015053:Zygote / Q000166:cytology*