Unit 4 Vocab

1. structure / Structures that are similar in unrelated organisms
7. structure / Organs or skeletal elements of animals and organisms
8. isolation / A form of reproductive isolation that prevents two different species from interbreeding with one another
10. Drift / A change in the gene pool of a population
12. isolation / Prezygotic barrier that leads to speciation
14. / Ability of an organism to survive and reproduce in its environment
17. / Change in a kind of organism over time; process by which modern organisms have descended from ancient organisms.
19. isolation / Physical separation of a group of individuals from others of the same species
21. / A characteristic that improves an individual's ability to survive and reproduce in a particular environment
22. divergence / The process in which two or more populations of an ancestral species accumulate independent genetic changes through time
23. Selection / A natural process resulting in the evolution of organisms best adapted to the environment

2. of the fittest / Process by which individuals that are better suited to their environment survive and reproduce most successfully
3. characteristic of the offspring
4. / Change in a DNA sequence that affects genetic information
5. / The preserved remains of traces of organisms that once lived on Earth
6. isolation / A form of reproductive isolation, wherein habitat preferences of species
9. selection / Selection by humans for breeding of useful traits from the natural variation among different organisms
11. structure / Structures that have no apparent function and appear to be residual parts from a past ancestor
13. / A term that typically describes a species that no longer has any know living individuals.
15. / The formation of new and distinct species in the course of evolution
16. isolation / Isolation between populations due to differences in courtship or mating behavior
18. the probability of mating
20. / A unit of heredity that is transferred from a parent to offspring and is held to determine