title: Oral structure development and nuclear behavior during conjugation in Paramecium aurelia.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000502:physiology*; D003227:Conjugation, Genetic / Q000528:radiation effects; D008858:Microscopy, Phase-Contrast; D009024:Morphogenesis; D010247:Paramecium / Q000254:growth & development*; D011830:Radiation Effects