title: Regulative development in a spiralian embryo as shown by cell deletion experiments on the Acoel, Childia.
mesh_terms: D000818:Animals; D002455:Cell Division; D005314:Embryonic and Fetal Development; D005260:Female; D005823:Genetics; D005855:Germ Layers / Q000502:physiology; D009030:Mosaicism; D010063:Ovum / Q000254:growth & development; D014419:Turbellaria / Q000145:classification / Q000196:embryology*