Across
- 2. Rise in Earth’s temperature due to greenhouse gases.
- 7. Gap where neurons communicate.
- 8. A section of DNA coding for a protein.
- 10. Hormone that controls metabolic rate.
- 14. A fast, automatic response to a stimulus.
- 17. Muscle activity that warms the body.
- 19. A change in DNA sequence.
- 20. Different forms of a gene.
- 22. Gradual change in species over time.
- 23. The genetic makeup of an organism.
- 27. Organism that makes its own food via photosynthesis.
- 29. Process where the best adapted survive and reproduce.
Down
- 1. Hormone that raises blood glucose.
- 3. Blood vessels widen to lose heat.
- 4. Breaks down dead material for nutrients.
- 5. The physical expression of genes.
- 6. Choosing parents for desired traits.
- 9. Maintains a stable internal environment.
- 11. A community of organisms and their environment.
- 12. Harmful substances introduced into the environment.
- 13. Hormone released in stress situations.
- 15. Hormone that lowers blood glucose.
- 16. Organism that eats other organisms.
- 18. Large-scale removal of trees and woodland.
- 21. Master gland of the endocrine system.
- 24. Position/level of an organism in a food chain.
- 25. Variety of living organisms in an area.
- 26. An allele only expressed if both copies are present.
- 28. An allele that is always expressed.