title: Nuclear behavior of Spirostomum ambiguum during conjugation with special reference to macronuclear development.
mesh_terms: D000818:Animals; D002467:Cell Nucleus; D002875:Chromosomes / Q000254:growth & development; D016798:Ciliophora / Q000254:growth & development; D005827:Genetics, Microbial; D008540:Meiosis; D008938:Mitosis