Across
- 2. Group of similar cells working together.
- 4. A trait that helps an organism survive in its environment.
- 6. A change in DNA sequence.
- 7. Type of cell division for growth and repair.
- 9. Protein that speeds up chemical reactions.
- 13. A segment of DNA that codes for a trait.
- 14. A group of organisms that can reproduce together.
- 16. Gas produced by plants during photosynthesis.
- 18. Natural environment where an organism lives.
- 20. The basic unit of life.
- 21. Preserved remains of ancient organisms.
Down
- 1. Movement of particles from high to low concentration.
- 3. A tiny particle that can only reproduce inside a host cell.
- 5. Process plants use to make food using sunlight.
- 8. Any living thing.
- 10. The powerhouse of the cell
- 11. Substance used to protect against disease.
- 12. Green pigment used in photosynthesis.
- 15. Made from amino acids, essential for structure and function in cells.
- 17. Organelle that controls the cell and stores DNA.
- 19. The main energy-carrying molecule in cells.