title: The ultrastructure of sperm development in the plant-parasitic nematode Meloidogyne hapla.
mesh_terms: D000818:Animals; D002453:Cell Cycle; D002467:Cell Nucleus / Q000648:ultrastructure; D002843:Chromatin / Q000648:ultrastructure; D003593:Cytoplasm; D008297:Male; D008540:Meiosis; D009348:Nematoda / Q000502:physiology / Q000648:ultrastructure*; D009940:Organoids / Q000648:ultrastructure; D013091:Spermatogenesis; D013094:Spermatozoa / Q000648:ultrastructure
chemical_list: D002843:Chromatin