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Definition
| The adjustment or changes in behavior, physiology, and structure of an organism to become more suited to an environment. |
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| The emergence of numerous species from a common ancestor introduced into an environment, presenting a diversity of new opportunities and problems. |
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| A mode of speciation induced when the ancestral population becomes segregated by a geographic barrier. |
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| Structures of different species having similar or corresponding function but not from the same evolutionary origin. |
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| The selective breeding of domesticated plants and animals to encourage the occurrence of desirable traits. |
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| The ability of natural selection to maintain diversity in a population. |
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| Biological Series concept |
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| The definition of a species as a population or group of populations whose members have the potential in nature to interbreed and produce fertile offspring. |
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| Genetic drift resulting from the reduction of a population, typically by a natural disaster, such that the surviving population is no longer genetically representative of the original population. |
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| The mutual influence on the evolution of two different species interacting with each other and reciprocally influencing each other's adaptions. |
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| The independent development of similarity between species as a result of their having similar ecological roles and selection pressures. |
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| Natural selection that favors individuals at one end of the phenotypic range. |
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| Disruptive (diversifying) Selection |
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Definition
| Natural selection that favors extreme over intermediate phenotypes. |
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| The process by which an interbreeding population or species diverges into two or more descendant species, resulting in once similar or related species to become more and more dissimilar. |
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| Ecological Species concept |
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Definition
| The idea that ecological roles (niches) identify species. |
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| Similarities between different species when acting as embryos, as support for having a common ancestry. |
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| Species that are confined to a specific, relatively small geographic area. |
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| All the changes that have transformed life on earth from its earliest beginnings to the diversity that characterizes it today. |
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| The death of an entire species. |
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| A relative measure of reproductive success of an organism in passing its genes to the next generation. |
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| Genetic drift attributable to colonization by a limited number of individuals from a parent population. |
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| The loss or gain of alleles in a population due to the migration of fertile individuals or between gamete populations. |
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| The total aggregate of genes in a population at any one time. |
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| Changes in the gene pool of a small population due to chance |
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Definition
| A view of Earth's history that attributes profound change to the cumulative product of slow but continuous processes. |
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