Across
- 2. plant, growth and development
- 3. cell, cell membrane and cell wall
- 5. a possible explanation for observations
- 6. cell wall
- 7. reproduction, one parent
- 8. evolution
- 13. more than one cell
- 15. reproduction, two parents
- 16. elimination of wastes
- 18. message
- 19. use metabolism to thermoregulate
- 21. basic unit of life
- 23. energy is used
- 24. organsim Darwin studied
- 26. feature Darwin studied
Down
- 1. signal
- 4. one cell
- 9. stable internal environment
- 10. food is broken down
- 11. variable that is observed
- 12. cell membrane
- 14. use the environment to thermoregulate
- 17. blueprint
- 20. building block of the cell
- 22. what varied among the Galapagos Islands
- 25. only one variable is changed