Terms : Hide Images
| 7708492011 | Allopatric speciation | The formation of new species in populations that are geographically isolated from one another | 0 | |
| 7708492012 | Artificial selection | The selective breeding of domesticated plants and animals to encourage the occurrence of desirable traits | 1 | |
| 7708492013 | Biogeography | The study of the past and present geographic distribution of species | 2 | |
| 7708492014 | Bottleneck effect | Genetic drift that occurs when the size of a population is reduced, as by a natural disaster or human actions | 3 | |
| 7708492015 | Cambrian explosion | A relatively brief time in geologic history when many present-day phyla of animals first appeared in the fossil record | 4 | |
| 7708492016 | Clades | A group of species that includes an ancestral species and all of its descendants | 5 | |
| 7708492017 | Cline | A graded change in a character along a geographic axis | 6 | |
| 7708492018 | Continental drift | The slow movement of the continental plates across Earth's surface | 7 | |
| 7708492019 | Convergent evolution | The evolution of similar features in independent evolutionary lineages | 8 | |
| 7708492020 | Endosymbiosis | A process in which a unicellular organism engulfs another cell, which lives within the host cell and ultimately becomes an organelle in the host cell | 9 | |
| 7708492021 | Founder effect | Genetic drift that occurs when a few individuals become isolated from a larger population and form a new population whose gene pool composition is not reflective of that of the original population | 10 | |
| 7708492022 | Gene flow | The transfer of alleles from one population to another, resulting from the movement of fertile individuals or their gametes | 11 | |
| 7708492023 | Genetic drift | A process in which chance events cause unpredictable fluctuations in allele frequencies from one generation to the next | 12 | |
| 7708492024 | Geologic record | The division of Earth's history into time periods, grouped into three eons (Achaean, Proterozoic, Phanerozoic) and further subdivided into eras, periods, and epochs | 13 | |
| 7708492025 | Hardy-Weinberg principle | The principle that frequencies of alleles and genotypes in a population remain constant from generation to generation, provided that only Mendelian segregation and recombination of alleles are at work | 14 | |
| 7708492026 | Heterozygous advantage | Greater reproductive success of heterozygous individuals compared with homozygotes and tends to preserve variation in a gene pool | 15 | |
| 7708492027 | Homologous structures | Structures in different species that are similar because of common ancestry | 16 | |
| 7708492028 | Macroevolution | Evolutionary change above the species level | 17 | |
| 7708492029 | Microevolution | Evolutionary change below the species level; change in the allele frequencies in a population over generations | 18 | |
| 7708492030 | Natural selection | A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits | 19 | |
| 7708492031 | Neutral variation | Genetic variation that does not provide a selective advantage of disadvantage | 20 | |
| 7708492032 | Paedomorphosis | The retention in an adult organism of the juvenile features of its evolutionary ancestors | 21 | |
| 7708492033 | Phylogenic tree | A branching diagram that represents a hypothesis about the evolutionary history of a group of organisms | 22 | |
| 7708492034 | Punctuated equilibria | In the fossil record, long periods of apparent stasis, in which a species undergoes little or no morphological change, interrupted by relatively brief periods of sudden change | 23 | |
| 7708492035 | Radiometric dating | A method for determining the absolute age of rocks and fossils, based on the half-life of radioactive isotopes | 24 | |
| 7708492036 | Ribozymes | An RNA molecule that functions as an enzyme, such as an intron that catalyzes its own removal during RNA splicing | 25 | |
| 7708492037 | Speciation | An evolutionary process in which one species splits into two or more species | 26 | |
| 7708492038 | Sympatric speciation | The formation of new species in populations that live in the same geographic area | 27 |
