Across
- 11. Process by which traits that improve an organism’s chances for survival and reproduction are passed on more frequently to future generations
- 12. Similarity in function and superficial resemblance of structures that have different origins
- 13. A change in a population’s gene pool
- 14. Prevents two different species from interbreeding with one another
- 15. Similar structures that evolved from a common ancestor
- 16. Separation of organisms as a result of change in their ecology or the environment in which they live
- 17. Reproductive events prevent members of closely related species, which could otherwise breed with one another
- 18. Occurs when biological populations become geographically isolated from each other to an extent that prevents or interferes with gene flow
- 19. The disappearance of a species from Earth
- 20. Describes how reproductively successful an an organism is in its environment
- 21. An individual with high fitness produces more offspring and therefore passes on its genes more frequently than an individual with low fitness
Down
- 1. Structures that have no apparent function and appear to be residual parts from a past ancestor
- 2. Process by which new species are generated
- 3. Process of selection conducted under human direction
- 4. A heritable trait that increases an individual’s fitness
- 5. Biological evolution that occurs by chance
- 6. Changes in DNA
- 7. A sequence of DNA that codes for a particular trait
- 8. The total number of genetic characteristics in the genetic makeup of a species
- 9. Preserved remains, or traces of remains, of ancient organisms
- 10. Occurs when members of a population diverge in their behaviors over time