Across
- 3. Transports nutrients and oxygen.
- 4. Groups of similar cells.
- 6. Stable internal conditions.
- 9. Change for survival.
- 12. Essential gas for respiration.
- 13. Energy use in organisms.
- 14. Breaks down food for energy.
Down
- 1. Ability to produce offspring.
- 2. Cells that transmit signals.
- 5. Facilitates gas exchange.
- 7. area Affects rate of diffusion.
- 8. Basic unit of life.
- 10. Individual living being.
- 11. Movement of water across a membrane.