Across
- 6. - Essential macromolecule made of amino acids.
- 10. - Chemical messenger in the body.
- 11. - Structure containing DNA in cells.
- 12. - Small DNA molecule within a cell.
- 13. - Green pigment in plants for photosynthesis.
- 15. - Genetic material in organisms.
- 16. - Microscopic organism, often a bacterium.
- 19. - Any living thing.
- 22. - Change in DNA sequence.
- 25. - Group of similar cells performing a function.
- 26. - Change in species over time.
- 27. - Substance used to stimulate immunity.
- 28. - Pores on leaves for gas exchange.
- 29. - Movement of water across a membrane.
Down
- 1. - Interaction between two different organisms.
- 2. - Unit of heredity in living organisms.
- 3. - Protein that speeds up chemical reactions.
- 4. - Maintaining stable internal conditions.
- 5. - Remains of ancient organisms.
- 7. - Basic unit of life.
- 8. - Group of similar organisms that can breed.
- 9. - Cell division resulting in two identical cells.
- 11. - Element essential for life.
- 14. - Process plants use to make food.
- 17. - Variety of life in an ecosystem.
- 18. - Community of living organisms and their environment.
- 20. - Nerve cell that transmits signals.
- 21. - Material that makes up chromosomes.
- 23. - Control center of a cell.
- 24. - Protein that helps fight infections.