Across
- 3. relating to vessels, like that carry blood in animals or water in plants
- 5. observable traits of an organism
- 7. a period of time in history marked by significant evenets
- 10. the dying out of a species
- 12. genetic makeup of an organism
- 15. weaker of two genes
- 17. basic unit of heredity
- 19. two or more alternative forms of a gene
- 21. organisms with a backbone
- 23. the molecule that carriers genetic information
- 24. study of the earth
Down
- 1. most powerful of two genes
- 2. the changing of a gene resulting in variation
- 4. packaged up DNA
- 6. organisms without a backbone
- 8. the young of living organisms
- 9. the passing on of traits genetically from one generation to another
- 11. passed down from ancestors
- 13. obtained for yourself or learned
- 14. era between precambrian and mesozoic
- 16. from the Latin twisted curve, shape of DNA
- 18. the supercontinent
- 20. era between paleozoic and cenozoic
- 22. a long and distinct period of history