Across
- 2. The study of structures of organisms
- 4. The change in the allele frequencies over generations
- 7. Changes followed by periods of stability
- 9. When a species die off due to a catastrophic event
- 11. All of the genes in a population
- 12. Parts of an animal that have the same function but different use
- 15. The migration of species in and out of populations
- 16. The species in an area
- 17. When two different species evolve with each other and form a special bond
- 18. Biological change that makes descendants look different
- 19. The study of embryonic similarities in species
- 20. The organisms that survive live to reproduce more than others
- 22. The study of where species live
Down
- 1. A species dying out slowly, ex: climate change
- 3. When one species eventually become two different species
- 5. If a body part has similar characteristics resulting from a common ancestor
- 6. Two animals came from a common ancestor
- 8. Even if it is not best for the species the females choose some males over another
- 10. Proof of prehistoric life
- 13. The study of prehistoric life
- 14. The study of how two species are related due to genes
- 21. A group of organisms that can reproduce with one another