Across
- 4. Structures that have lost their original function over time
- 5. Natural selection that favors individuals at both extremes of a phenotypic range
- 8. The ability of an individual to survive and reproduce in its environment
- 10. The scientific explanation for how species change over time
- 13. The process by which one species splits into two or more species
- 16. Speciation that occurs when populations share the same geographical area but become reproductively isolated
- 17. Selection that occurs due to differences in traits related to mating success
- 19. The deliberate breeding of plants or animals to produce desirable traits:
- 21. The production of more offspring than can be supported by the environment
- 22. The creation of a new species through human intervention
- 23. The process by which certain traits become more or less common in a population over time
Down
- 1. A process in which organisms with certain traits survive and reproduce at a higher rate than others
- 2. Speciation that occurs when a small group of individuals colonizes a new area and forms a new population
- 3. Natural selection that favors individuals at one end of a phenotypic range
- 6. Natural selection that favors intermediate phenotypes
- 7. Structures that are similar in different species because of common ancestry
- 9. Speciation that occurs when a physical barrier separates a population into two or more groups
- 11. The study of the development of embryos
- 12. The idea that all living species are descended from a common ancesto
- 14. A heritable trait that helps an organism survive and reproduce in its environment
- 15. Speciation that occurs when populations are adjacent to each other but do not interbreed
- 18. Differences in physical, physiological, and behavioral traits among individuals:
- 20. The struggle among individuals for resources