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Definition of Natural selection

Babylon English

process in which species that are best adapted to their environments will survive
Natural selection Definition from Arts & Humanities Dictionaries & Glossaries
Theological and Philosophical Biography and Dictionary
Darwin 's view of evolution with five principles: 1. Proliferation of species ; 2. Variation; 3. Struggle for existence; 4. Survival of the fittest; 5. Heredity .
Natural selection Definition from Language, Idioms & Slang Dictionaries & Glossaries
hEnglish - advanced version

natural selection
n : a natural process resulting in the evolution of organisms best adapted to the environment [syn: survival, survival of the fittest , selection]

natural selection
(biol.), a supposed operation of natural laws analogous, in its operation and results, to designed selection in breeding plants and animals, and resulting in the survival of the fittest. the theory of natural selection supposes that this has been brought about mainly by gradual changes of environment which have led to corresponding changes of structure, and that those forms which have become so modified as to be best adapted to the changed environment have tended to survive and leave similarly adapted descendants, while those less perfectly adapted have tended to die out though lack of fitness for the environment, thus resulting in the survival of the fittest. see darwinism...
see natural

WordNet 2.0

1. a natural process resulting in the evolution of organisms best adapted to the environment
(synonym) survival, survival of the fittest, selection
(hypernym) natural process, natural action, action, activity
Natural selection Definition from Science & Technology Dictionaries & Glossaries
Description: Process by which the genotypes in a population that are best adapted to the environment increase in frequency relative to less well-adapted genotypes over a number of generations.
Source: Specialized encyclopedia and dictionaries
© European Communities, 1995-2004
Common Terms in Evolutionary Biology and Genetics
(Darwin's definition, 1859): "As many more individuals of each species are born than can possibly survive; and as, consequently, there is a frequent recurrent struggle for existence, it follows that any being, if it varies however slightly in any manner profitable to itself, under the complex and sometimes varying conditions of life, will have a better chance of surviving, and thus be naturally selected." Link to a simulation on natural selection.
Fishery Glossary
Natural process by which organisms that adapt to their environment survive while those that do not adapt become eliminated progressively. United Nations (1997
Natural selection Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in heritable traits of a population over time. The term "natural selection" was popularised by Charles Darwin who compared it with artificial selection, now more commonly referred to as selective breeding.

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Natural selection Definition from Entertainment & Music Dictionaries & Glossaries
English to Federation-Standard Golic Vulcan
Natural selection Definition from Religion & Spirituality Dictionaries & Glossaries
Natural Selection In Darwinian theory, an important factor in biological evolution. If, for example, a number of animals of one species are exposed to an unduly cold climate, many will die, and the survivors will be the hardier ones. These hardier ones are said to transmit their hardiness to their posterity, whereby the species becomes modified to that extent. A continual succession of such small changes, provoked by changes of environment, was supposed to act cumulatively, thus eventually producing the differences distinguishing one species from another. From this, in combination with other kinds of selection, such as sexual selection, the higher animal types have in the course of ages been derived from the lower.
The theory is open to grave objections on several grounds. There is a complete lack of evidence of the existence of any such permanently cumulative effect; further, such variations are temporary, and procreation tends to a reversion to the standard type as soon as the environmental influence is withdrawn. Again, such a process would tend to produce the greatest diversity and divergence among the species, each variety differentiating more and more widely in its own special direction, without any tendency toward a mounting scale of perfection from ameba to man.
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