Across
- 4. An organism made of many cells.
- 5. How an organism reacts to a stimulus.
- 9. The process plants use to make food using sunlight, water, and carbon dioxide.
- 10. Membrane A thin layer that surrounds the cell and controls what enters and leaves.
- 11. System A group of organs that work together to perform a major function in the body.
- 18. The job or purpose of a structure.
- 19. Wall A rigid outer layer that supports and protects plant cells.
- 20. The part of plant cells that uses sunlight to make food.
- 21. A jelly-like substance inside the cell where organelles are found.
- 24. The process cells use to release energy from food.
- 25. The movement of water across a membrane from high to low concentration.
- 26. The body system that supports and protects the body.
Down
- 1. The ability of an organism to maintain stable internal conditions.
- 2. The smallest unit of life that can carry out all life processes.
- 3. The system that allows you to breathe and exchange oxygen and carbon dioxide.
- 6. The part of the cell that controls its activities and contains DNA.
- 7. A structure made of different tissues that work together to do a job.
- 8. A group of similar cells that work together to perform a specific function.
- 10. The system that transports blood, oxygen, and nutrients through the body.
- 12. An organism made of only one cell.
- 13. The part of the cell that produces energy.
- 14. Something in the environment that causes a response.
- 15. The movement of particles from an area of high concentration to low concentration.
- 16. The system that allows the body to move.
- 17. A trait that helps an organism survive in its environment.
- 22. The way something is built or arranged.
- 23. A living thing made up of one or more cells.