#cell_nucleus__nucleus__nucleu__karyon  a part of the cell containing DNA and RNA and responsible for growth and reproduction
  supertype:  organelle__cell_organ  a specialized part of a cell; analogous to an organ
  substance:  nucleoplasm
  part:  nucleolus  chromatin  achromatin  chromosome
  part of:  cell
  subtype:  pronucleus  the nucleus of the ovum or sperm after fertilization but before they fuse to form the nucleus of the zygote

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