Unit 4 Vocab-Part B

5. Structure Structures that are same as ancestors but have parts that dont function or isn’t used anymore.
7. A heritable trait that increases an individual’s fitness.
11. Isolation Isolation due to time differences of mating seasons.
13. Selection The process by which traits that improve an organism’s chances for survival and reproduction are passed on more frequently to future generations than those that do not.
15. Structure similar structures that evolved from a common ancestor.
16. Structure Features of different species that are similar in function but not in structure.
17. Drift Biological evolution that occurs by chance.
18. Isolation Reproductive barrier that prevents mating due to sexual organ differences.
19. Isolation A prezygotic barrier that prevents interbreeding between closely related specifies.

1. The preserved remains, or traces of remains of ancient organisms.
2. The disappearance of a species from Earth.
3. New species are generated.
4. Isolation the physical separation of members of a population.
6. Isolation Isolation due to changes of their ecological or environment that they live.
7. Selection Selection process conducted under human direction.
8. A sequence of DNA that codes for a particular trait.
9. How reproductively successful an organism is in its environment.
10. of the fittest The continued existence of organisms which are best adapted to their environment, with the extinction of others.
12. Changes in DNA.
14. A change in apopulation’s gene pool over time.
17. Divergence Process in which two or more populations of an ancestral species accumulate independent genetic changes through time.