Across
- 4. How well an organism can survive and reproduce in its environment.
- 7. Differences in the physical traits of organisms.
- 9. Organisms with traits that make them better adapted to their environment will live longer and reproduce more than organisms less adapted to the environment.
- 11. When unrelated species evolve similar characteristics because they live in similar environments
- 13. when isolation, such as geographically, causes two populations of organisms to become so different that they can no longer reproduce with each other and create viable offspring.
- 14. The study of the embryonic development in vertebrates that has led to support the theory of common ancestry among vertebrates.
- 15. study of the distribution of plants and animals on Earth
- 16. Biological change over time that causes descendants to be different from their ancestors.
- 17. A physical trait that increases an organism's ability to survive in its environment.
- 18. The study of prehistoric life that allows scientists to make connections between current and extinct species
Down
- 1. Elimination of a species
- 2. The sudden elimination of a species due to a catastrophic event
- 3. A number of different species arise from one common ancestor.
- 5. Remnants of animals (bones, footprints, feces, etc)
- 6. Slow changes in allele frequencies over a long periods of time.
- 8. When two organisms change in response to each other forming a specialized relationship. Ex. predator and prey.
- 10. Field of classifying organisms & assigning each organism a universally accepted name.
- 12. Study of nucleic acids and proteins to show evolutionary relationships