Across
- 4. concept of Charles Darwin, continued existence of organisms which are best adapted to their environment & the extinction of others.
- 6. change over time
- 8. divergence between populations occupying the same geographic range, leading to distinct species.
- 11. a heritable trait that increases an individuals fitness and survival.
- 14. the process of selection conducted under human direction
- 15. sequence of DNA that codes for a particular trait
- 16. changes in DNA
- 18. a physical incompatibility between reproductive organs of two organisms.
- 19. form of reproductive isolation, where habitat preferences of species lowers the probability of mating.
- 20. the preserved remains of impression of an extinct organism
Down
- 1. when species are reproductively isolated from others, due to differences in behaviors.
- 2. a feature a species inherited from an ancestor but now is less elaborate & functional
- 3. the process by which traits that improve chances of survival are passed on.
- 5. the disappearance/dying off of a species
- 7. the separation of species by physical barriers, examples may be mountains, oceans, etc.
- 9. the process of how new species are generated
- 10. a reproductive barrier that prevents interbreeding between closely related species, due to differences in fertility, etc.
- 12. biological evolution that occurs by chance
- 13. physical features found in different organisms that share a common ancestor.
- 17. how reproductively successful an organism is in their environment.