- —selectional, adj./si lek"sheuhn/, n.1. an act or instance of selecting or the state of being selected; choice.2. a thing or a number of things selected.3. an aggregate of things displayed for choice, purchase, use, etc.; a group from which a choice may be made: The store had a wide selection of bracelets.4. Biol. any natural or artificial process that results in differential reproduction among the members of a population so that the inheritable traits of only certain individuals are passed on, or are passed on in greater proportion, to succeeding generations. Cf. natural selection, sexual selection, kin selection, artificial selection.5. Ling.a. the choice of one form instead of another in a position where either can occur, as of ask instead of tell or with in the phrase ask me.b. the choice of one semantic or syntactic class of words in a construction, to the exclusion of others that do not occur there, as the choice of an animate object for the verb surprise.Syn. 2. collection, gathering, pick.Ant. 1. rejection.
* * *In biology, the preferential survival and reproduction or preferential elimination of individuals with certain genotypes, by means of natural or artificial controlling factors.The theory of evolution by natural selection was proposed by Charles Darwin and Alfred Russel Wallace in 1858. Artificial selection differs from natural selection in that inherited variations in a species are manipulated by humans through controlled breeding in order to create qualities economically or aesthetically desirable to humans, rather than useful to the organism in its natural environment.
* * *▪ biologyin biology, the preferential survival and reproduction or preferential elimination of individuals with certain genotypes (genotype) (genetic compositions), by means of natural or artificial controlling factors.The theory of evolution by natural selection was proposed by Charles Darwin (Darwin, Charles) and Alfred Russel Wallace (Wallace, Alfred Russel) in 1858. They argued that species with useful adaptations to the environment are more likely to survive and produce progeny than are those with less useful adaptations, thereby increasing the frequency with which useful adaptations occur over the generations. The limited resources available in an environment promotes competition in which organisms of the same or different species struggle to survive. In the competition for food, space, and mates that occurs, the less well-adapted individuals must die or fail to reproduce, and those who are better adapted do survive and reproduce. In the absence of competition between organisms, natural selection may be due to purely environmental factors, such as inclement weather or seasonal variations. (See natural selection.)Artificial selection (or selective breeding) differs from natural selection in that heritable variations in a species are manipulated by humans through controlled breeding. The breeder attempts to isolate and propagate those genotypes that are responsible for a plant or animal's desired qualities in a suitable environment. These qualities are economically or aesthetically desirable to humans, rather than useful to the organism in its natural environment.In mass selection, a number of individuals chosen on the basis of appearance are mated; their progeny are further selected for the preferred characteristics, and the process is continued for as many generations as is desired. The choosing of breeding stock on the basis of ancestral reproductive ability and quality is known as pedigree selection. Progeny selection indicates choice of breeding stock on the basis of the performance or testing of their offspring or descendants. Family selection refers to mating of organisms from the same ancestral stock that are not directly related to each other. Pure-line selection involves selecting and breeding progeny from superior organisms for a number of generations until a pure line of organisms with only the desired characteristics has been established.Darwin also proposed a theory of sexual selection, in which females chose as mates the most attractive males; outstanding males thus helped generate more young than mediocre males.
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sélection — [ selɛksjɔ̃ ] n. f. • 1609 « choix » (didact.); lat. selectio I ♦ 1 ♦ (rare av. XIXe) Action de choisir les objets, les individus qui conviennent le mieux. Faire une première sélection parmi, entre des candidats. ⇒ présélection. Critères de… … Encyclopédie Universelle
selection — se‧lec‧tion [sˈlekʆn] noun 1. [uncountable] the careful choice of a particular person or thing from a group: • The Health Authority is not involved in staff selection and recruitment. • Our deputy manager can supply details of the job,… … Financial and business terms
Selection — Sélection Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom … Wikipédia en Français
Selection 37 — Sélection 37 Sélection 37 Longueur hors tout : 11,35 m hors tout, 8,95 m flottaison Maître bau : 3,25 m Tirant d’eau : 1,90 m … Wikipédia en Français
Sélection 37 — Équipage 8 maximum Longueur hors tout 11,35 m hors tout, 8,95 m flottaison Maître bau 3,25 m Tirant d eau 1,90 m Voilure 70,25 m² Déplacement 3,4 t (lest 1,1 t) Architecte … Wikipédia en Français
Selection No 1 — Selection No. 1 EP von Drum Connection Veröffentlichung 1. Januar 2011 Label Drum Connection Music … Deutsch Wikipedia
Selection — Se*lec tion, n. [L. selectio: cf. F. s[ e]lection.] . The act of selecting, or the state of being selected; choice, by preference. [1913 Webster] 2. That which is selected; a collection of things chosen; as, a choice selection of books. [1913… … The Collaborative International Dictionary of English
Selection — Álbum de Marlango Publicación 2007 Género(s) jazz blues pop Discográfica Subterfuge Records … Wikipedia Español
selection — [sə lek′shən] n. [L selectio] 1. a selecting or being selected 2. a) a person or thing chosen b) a group or collection of these c) a variety from which to choose [a selection of colors] 3 … English World dictionary
selection — I (choice) noun adoption, appointment, appropriation, assignment, compilation, cooptation, decision, delectus, denomination, designation, determination, electio, election, extraction, indication, naming, nomination, ordainment, ordination,… … Law dictionary
selection — ► NOUN 1) the action or fact of selecting. 2) a number of selected things. 3) a range of things from which a choice may be made. 4) a horse or horses tipped as worth bets in a race or meeting. 5) Biology the evolutionary process which determines… … English terms dictionary