Evolution and Natural Selection

2. choosing parents with particular characteristics to breed together and produce offspring with more desirable characteristics.
7. occurs when the sperm from the male parent fertilizes an egg from the female parent, producing an offspring
9. A large group of single-cell microorganisms. Bottleneck Effect
10. Effect the loss of genetic variation that occurs after outside forces destroy most of a population.
12. cases where two (or more) species reciprocally affect each other's evolution.
13. a branch of science that is related to the formation, growth, and development of embryo
15. involves one parent and produces offspring that are genetically identical to each other and to the parent. Asexual Reproduction
16. the complete disappearance of a species from Earth.
17. the change in frequency of an existing gene variant in the population
18. type of structural modification made to a part of the body
20. Evidence the evidence of bacteria, animals, and plants that lived in the past

1. a modification of an organism or its parts that makes it more fit for existence
3. something an animal does usually in response to some type of external stimulus in order to survive Behavioral Adaptation
4. occurs when a small group of individuals becomes separated from a larger population.
5. those from organisms that share a common ancestor.
6. a mechanism of evolution
8. the transfer of genetic material from one population to another. Gene Flow
11. organisms whose cells lack a nucleus and other organelles
14. Different organisms that have different inherited information.
19. One of two or more DNA sequences occurring at a particular gene locus Homologous Structure