Across
- 2. The five-fingered limb structure found in mammals, birds, and reptiles.
- 3. Structures that are similar in different species due to common ancestry.
- 5. Speciation occurring within the same geographic area due to behavioral or temporal factors.
- 6. A dark-colored variant of an organism, like the peppered moth.
- 10. Differences between individuals of a population caused by mutation or meiosis.
- 11. The process where better-adapted individuals survive and pass on genes.
- 12. The theory that evolution occurs through small, steady changes over time.
- 13. The cumulative change in the heritable characteristics of a population.
- 15. Evolution that occurs when two species become increasingly different.
- 19. Artificial selection where humans choose specific traits for reproduction.
- 20. The state of being separated, preventing interbreeding between populations.
Down
- 1. The theory that evolution consists of long stable periods followed by rapid change.
- 4. The process by which one species splits into two or more separate species.
- 7. Structures with similar functions but different evolutionary origins.
- 8. Speciation occurring due to geographic separation.
- 9. A heritable characteristic that enhances an organisms ability to survive.
- 14. Producing more offspring than the environment can support to ensure survival.
- 16. The ability of an organism to survive and contribute to the next generation.
- 17. The total collection of all genes and alleles in a population.
- 18. Organs or structures that have lost their original function through evolution.