Across
- 1. A different or distinct form or version of something.
- 5. "Survival of the Fittest"
- 6. Process for determining the age of an object by the amount radioactive material it has.
- 7. to produce far more offspring than can survive
- 10. Body part in different species that is similar in function but not in structure
- 13. Any alteration in the structure or function of an organism.
- 15. An organ or bone that appears in different animals.
- 18. Set of all genes
- 19. An organ that has no function.
Down
- 2. The process of determining an approximate computed age.
- 3. Fossilized remains that shows traits common to both a ancestral group and descendant group
- 4. total number of fossils that have been discovered.
- 8. cellular organism that has no nuclear membrane
- 9. The time it takes for a radioactive substance to lose half its radioactivity.
- 10. Process of breeding to get desirable traits.
- 11. A group of organisms of one species.
- 12. Health and Well Being
- 14. The changing of the structure of a gene
- 16. an organism consisting of a cell
- 17. no longer in existence
