Across
- 1. Traits passed down from parents
- 4. The study of genes
- 5. Parts of an organism
- 8. Characteristacs of an organism
- 9. An organism's young
- 10. The amount of organisms in an area
Down
- 2. When an entire species is killed
- 3. A group of animals that can breed
- 6. When an organism breeds
- 7. How an animal changes to survive