Unit 4 Evolution and Natural Selection Vocabulary

4. Physical separation of a group of individuals from others of the same species
7. Structures that has the same function but different construction and was not inherited from a common ancestor
9. Change in a DNA sequence that affects genetic information
12. The preserved remains or traces of organisms that once lived on earth
13. The two species that would otherwise have a chance of reproducing can not because they do not live in the same area
14. A unit of heredity that is transferred from a parent to offspring and is held to determine some characteristics of the offspring
15. A change in the gene pool of a population due to change
16. The formation of new and distinct species in the course of evolution
19. Ability of an organism to survive and reproduce in its environment
20. The parts and/or chemicals involved in the mating recess that do not work between the species
21. A characteristic that improves an individuals ability to survive and reproduce in a particular environment.

1. Structure that is inherited from ancestors but has lost much or all of its original function
2. Isolation between populations due to differences in courtships or mating behaviors.
3. Structures in different species that are similar because of common ancestry
5. Process by which individuals that are better suited to their environment survive and reproduce most successfully
6. Selection by humans for breeding of useful traits from the natural variation among different organisms
8. A natural process resulting in the evolution of organisms best adapted to the environment
10. Change in a mind of organism over time; process by which modern organisms have descended from ancient organisms
11. The accumulation of differences between species or populations
17. Term that typically describes a species that no longer has any known living individuals
18. The two species that do not reproduce because their mating mating seasons are at different times of the year.