Natural Selection

2. Any reason for organisms with certain phenotypes to have either a survival benefit or disadvantage.
4. States that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences.
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10. The set of observable characteristics of an individual.
11. A different or distinct form or version of something.
12. the ability of an organism to pass on its genetic material to its offspring.
15. The change in the characteristics of a species over several generations.
16. one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.
18. Popularized the theory of evolution.
19. the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations.
20. The process whereby distantly related organisms independently evolve similar traits to adapt to similar necessities.
21. A subset of individuals of one species that occupies a particular geographic area.

1. The process whereby organisms better adapted to their environment tend to survive and produce more offspring.
3. The seasonal movement of animals from one habitat to another in search of food, better conditions, or reproductive needs.
5. Describes how animals, plants, and other living organisms manage to successfully survive changes to their environment or fail.
6. the changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes.
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13. The reduced genetic diversity which results when a population is descended from a small number of colonizing ancestors.
14. When a population is greatly reduced in size.
17. The surroundings or conditions in which a person, animal, or plant lives or operates.