Unit 6 Biology

6. the action or art of imitating someone or something, typically in order to entertain or ridicule.
9. an evolutionary process in which humans consciously select for or against particular features in organisms.
11. the stock of different genes in an interbreeding population.
13. the ability to survive to reproductive age, find a mate, and produce offspring.
14. a particular section, group, or type of people or animals living in an area or country.
15. an extreme example of genetic drift that happens when the size of a population is severely reduced.
17. the reduced genetic diversity which results when a population is descended from a small number of colonizing ancestors.
21. he hypothesis that evolution proceeds chiefly by the accumulation of gradual changes.
23. the difference in DNA among individuals or the differences between populations.
24. change or difference in condition, amount, or level typically with certain limit
25. occurs when individuals with traits on one side of the mean in their population survive better or reproduce more than those on the other.
26. occurs when the population stabilizes on a particular trait value and genetic diversity decreases.

1. principle stating that the genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.
2. calculates an age in years for geologic materials by measuring the presence of a short-life radioactive element.
3. ariation in the relative frequency of different genotypes in a small population.
4. occurs when mismatches in mating traits (signals and/or preferences) prevent mating between two species/populations.
5. when mismatches in mating traits (signals and/or preferences) prevent mating between two species/populations.
7. The physical separation of members of a population.
8. ny movement of individuals, and/or the genetic material they carry, from one population to another.
10. the process through which populations of living organisms adapt and change.
12. the action or process of adapting or being adapted.
16. the action of coming to live permanently in a foreign country.
18. he act of leaving one's own country to settle permanently in another; moving abroad.
19. occurs when individuals of intermediate phenotype are less fit than those of both higher and lower phenotype, such that extremes are favored.
20. represents the incidence of a gene variant in a population.
22. a defense mechanism or tactic that organisms use to disguise their appearance, usually to blend in with their surroundings.