Natural Selection
Across
- 2. ability of an organism to survive and reproduce in its environment
- 5. The gradual changes in gene frequencies in a population due to random events
- 6. dealing with the geographical distribution of animals and plants
- 7. the branch of biology that deals with the structure of animals and plants
- 8. large-scale evolutionary changes that take place over long periods of time
- 11. This type of isolation is a separation of species or populations so that they cannot interbreed and produce fertile offspring
- 12. the evolution of a biological species
- 14. type of similar structure found in more than one species that share a common ancestor
- 16. Any change across successive generations in the heritable characteristics of biological populations
- 17. The theory that evolution occurs slowly but steadily
- 18. remnant of a structure that may have had an important function in a species' ancestors, but has no clear function in the modern species
- 21. type of isolation that separates populations as a result of geographic change or migration to geographically isolated places
- 23. the perserved trace, imprint, or remains of a plant or animal
- 24. a change or alteration in form or qualities
- 25. Punctuated Equilibrium is a theory of evolution holding that evolutionary change in the ____ record came in fits and starts rather than in a steady process of slow change
Down
- 1. An English naturalist who established that all species of life have descended over time from common ancestry
- 3. Process by which individuals that are better suited to their environment survive and reproduce most successfully
- 4. A ____ Tree is a chart showing evolutionary relationships as determined by phylogenic systematics
- 9. Natural Selection is the gradual, ____ process by which biological traits become either more or less common in a population as a function of differential reproduction of their bearers
- 10. Process through which early prokaryotic cells are thought to have engulfed other, smaller cells and eventually incorporated them as organelles
- 12. inactivity resulting from a static balance between opposing forces
- 13. form of reproductive isolation in which 2 populations have differences in courtship rituals or other types of behavior that prevent them from interbreeding
- 15. the accumulation of differences between groups
- 19. the branch of biology that studies the formation and early development of living organisms
- 20. These types of structures do not have a common evolutionary origin but are similar in function
- 22. a trait that helps an organism survive and reproduce