title: Morphology of ribosomal RNA cistrons in oocytes of the water beetle, Dytiscus marginalis L.
mesh_terms: D000818:Animals; D002466:Cell Nucleolus / Q000648:ultrastructure; D002467:Cell Nucleus / Q000648:ultrastructure; D002843:Chromatin; D001517:Coleoptera / Q000648:ultrastructure*; D004247:DNA; D004270:DNA, Circular; D005260:Female; D005796:Genes; D008854:Microscopy, Electron; D009693:Nucleic Acid Hybridization; D009865:Oocytes / Q000648:ultrastructure*; D009866:Oogenesis; D010063:Ovum / Q000648:ultrastructure*; D012335:RNA, Ribosomal; D014158:Transcription, Genetic
chemical_list: D002843:Chromatin; D004270:DNA, Circular; D012335:RNA, Ribosomal; D004247:DNA