Across
- 4. Which category of living things only have one cell?
- 6. Without the ________, a cell will not be able to undergo cell division.
- 8. Which cell does not have a nucleus?
- 9. Cell division is necessary to ensure ________ of the cell.
Down
- 1. A group of tissues is called ________.
- 2. Cells are the _______ building blocks of life.
- 3. A single celled organism is called a __________ cell.
- 5. A group of cells is called ________.
- 7. The cell membrane is _____- permeable (only allows certain substances to move in and out).