Across
- 3. A type of organism whose cells lack cell walls and chloroplasts.
- 6. A structure made of different tissues working together.
- 7. Single-celled organisms that can be found almost everywhere.
- 8. The genetic material found in the nucleus.
- 9. A type of cell that sends messages through the body.
- 11. The body's largest organ.
- 12. Made up of many cells.
- 13. The jelly-like substance inside a cell.
- 16. A group of similar cells working together.
- 18. The job performed by a cell or organelle.
- 19. Any living thing.
- 20. A cell that carries oxygen throughout the body.
Down
- 1. The basic unit of life.
- 2. The thin layer that controls what enters and leaves a cell.
- 4. A specialized structure inside a cell with a specific job.
- 5. A type of organism whose cells have chloroplasts and cell walls.
- 8. The process by which one cell becomes two cells.
- 9. The control center of a cell.
- 10. What cells need to carry out their functions.
- 14. Cells are the building blocks of this.
- 15. A tool used to see cells that are too small to view with the naked eye.
- 17. Made up of only one cell.