Across
- 3. To preserve a species' population
- 6. How do cells get oxygen?
- 7. Carries oxygen to the cells
- 8. One of the factors of making diffusion faster that gives cells more energy
- 9. Partially permeable to allow only certain particles to pass through
- 14. The ability for organisms to react to their environment
Down
- 1. What cells need to produce energy
- 2. Speeds up diffusion by giving it more area to work with
- 4. How do our cells turn glucose into energy?
- 5. Helps organisms escape danger or find food
- 10. Used to get rid of potentially poisonous waste products
- 11. When organisms burn up food to release energy
- 12. Needed by organisms to grow and repair tissue
- 13. To grow in size