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purposeful hybridization

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  • Introduced species — Alien species redirects here. For life on planets other than Earth, see Extraterrestrial life. For a list of extraterrestrials in fiction, see List of alien species. Sweet clover (Melilotus sp.), introduced and naturalized to the U.S. from… …   Wikipedia

  • Gene flow — In population genetics, gene flow (also known as gene migration) is the transfer of alleles of genes from one population to another.Migration into or out of a population may be responsible for a marked change in allele frequencies (the proportion …   Wikipedia

  • Invasive species — See also: List of invasive species, Introduced species, Pest (organism), and Weed North American beavers constitute an invasive species in Tierra del Fuego, where they have a substantial impact on landscape and local ecology through their… …   Wikipedia

  • Extinction — [ thumb|The Dodo, shown here in a 1651 illustration by Jan Savery, is an often cited example of modern extinction.cite book | last = Diamond | first = Jared | authorlink = Jared Diamond | title = Guns, Germs, and Steel | publisher = date = 1999|… …   Wikipedia

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  • Lentic ecosystems — are the ecosystems of lakes, ponds and swamps. Included in these environments are the biotic interactions (amongst plants, animals and micro organisms) together with the abiotic interactions (physical and chemical).cite book | last = Brown first …   Wikipedia

  • United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …   Universalium

  • autoradiograph — Image of the distribution and concentration of radioactivity in a tissue or other substance made by placing a photographic emulsion on the surface of, or in close proximity to, the substance. SYN: autoradiogram. * * * au·to·ra·dio·graph .g …   Medical dictionary

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