Biology

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Across
  1. 2. substance that produces or promotes the development of cancer
  2. 4. First phase of mitosis; Chromosomes condense
  3. 6. The region at the tip of a chromosome
  4. 8. Third phase of mitosis; chromatids separate, pulled to opposite sides
Down
  1. 1. Type of protein molecule found in the chromosomes of eukaryotic cells but not prokaryotic cells
  2. 2. the substance that composes eukaryotic chromosomes;contains specific proteins DNA and small amounts of RNA
  3. 3. one of the two strands of a chromosome that become visible during meiosis or mitosis
  4. 5. The life _____ of a cell
  5. 7. Having no serious effect on heath
  6. 9. Programmed cell death