Biology

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Across
  1. 3. The first to describe cells.
  2. 4. Part of the cell that contains DNA.
  3. 5. Specialized structures within the cell.
  4. 7. Structure that surrounds the cell.
  5. 9. Cell without a defined nucleus (e.g., bacteria).
  6. 10. theory Principle stating that all cells come from other cells.
Down
  1. 1. Instrument used to see cells.
  2. 2. Protects the cell and regulates the passage of substances.
  3. 6. Cell with a defined nucleus (e.g., animal and plant cells).
  4. 8. Basic structure of the organism.