title: Protozoan habituation learning after loss of macronuclei and cytoplasm.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000502:physiology*; D016798:Ciliophora; D003593:Cytoplasm / Q000502:physiology*; D006185:Habituation, Psychophysiologic; D007858:Learning; D008568:Memory