Across
- 4. structures in the cytoplasm where proteins are made
- 6. way to gain knowledge about the natural world
- 9. individual living thing
- 11. first step of the scientist methods
- 13. genetic material
- 15. keeping the cell constant and alive
- 17. sum of all the reactions within an organism
- 20. relationship between species where at least one of benefits
Down
- 1. group of the same kind of cell
- 2. similar ecosystem with the similar environments
- 3. thin coast of lipids that surround the cell
- 5. - keeping the cell constant and alive
- 6. mixture of two substances
- 7. energy is emitted during the reaction
- 8. unchanged in the experiment
- 10. speed up reaction in cells, without them most life would die
- 12. energy is absorbed during the reaction
- 14. used for comparison
- 16. name given to the earth
- 18. electrical charge difference between areas of molecule
- 19. all the cellular material inside the plasma membrane