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In biology, evolution is the process of change in the inherited traits of a population of organisms from one generation to the next. Genes that are passed on to an organism's offspring produce the inherited traits that are the basis of evolution. Mutations in genes can produce new or altered traits in individuals, resulting in the appearance of heritable differences between organisms. New traits may also arise from the transfer of genes between populations, as in migration, or between species, in horizontal gene transfer. In species that reproduce sexually, new combinations of genes are produced by genetic recombination, which can increase the variation in traits between organisms. Evolution occurs when these heritable differences become more common or rare in a population.

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Wikipedia about evolved

In biology, evolution is the process of change in the inherited traits of a population of organisms from one generation to the next. Genes that are passed on to an organism's offspring produce the inherited traits that are the basis of evolution. Mutations in genes can produce new or altered traits in individuals, resulting in the appearance of heritable differences between organisms. New traits may also arise from the transfer of genes between populations, as in migration, or between species, in horizontal gene transfer. In species that reproduce sexually, new combinations of genes are produced by genetic recombination, which can increase the variation in traits between organisms. Evolution occurs when these heritable differences become more common or rare in a population.

There are two major mechanisms that drive evolution. The first is natural selection, a process causing heritable traits that are helpful for survival and reproduction to become more common in a population, and harmful traits to become more rare. This occurs because individuals with advantageous traits are more likely to reproduce, so that more individuals in the next generation inherit these traits.{{cite journal |author=Lande R, Arnold SJ |year=1983 |title=The measurement of selection on correlated characters |journal=Evolution |volume=37 |pages=1210–26} |doi=10.2307/2408842}} Over many generations, adaptations occur through a combination of successive, small, random changes in traits, and natural selection of those variants best-suited for their environment. The second is genetic drift, an independent process that produces random changes in the frequency of traits in a population. Genetic drift results from the role probability plays in whether a given trait will be passed on as individuals survive and reproduce. Though the changes produced in any one generation by drift and selection are small, differences accumulate with each subsequent generation and can, over time, cause substantial changes in the organisms.

One definition of a species is a group of organisms that can reproduce with one another and produce fertile offspring. When a species is separated into populations that are prevented from interbreeding, mutations, genetic drift, and natural selection cause the accumulation of differences over generations and the emergence of new species. The similarities between organisms suggest that all known species are descended from a common ancestor (or ancestral gene pool) through this process of gradual divergence.

Evolutionary biology documents the fact that evolution occurs, and also develops and tests theories that explain its causes. Studies of the fossil record and the diversity of living organisms had convinced most scientists by the mid-nineteenth century that species changed over time. However, the mechanism driving these changes remained unclear until the 1859 publication of Charles Darwin's On the Origin of Species, detailing the theory of evolution by natural selection. . Related earlier ideas were acknowledged in Darwin's work soon led to overwhelming acceptance of evolution within the scientific community. Joint statement issued by the national science academies of 67 countries, including the United Kingdom's Royal Society from the world's largest general scientific society In the 1930s, Darwinian natural selection was combined with Mendelian inheritance to form the modern evolutionary synthesis, in which the connection between the units of evolution (genes) and the mechanism of evolution (natural selection) was made. This powerful explanatory and predictive theory directs research by constantly raising new questions, and it has become the central organizing principle of modern biology, providing a unifying explanation for the diversity of life on Earth.

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Evolutionary psychology - Wikipedia, the free encyclopedia

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Are triumph displays learned or hard-wired?

New ScientistA study of blind athletes indicates that they are built-in and evolved as a way of asserting a position in a social hierarchy (full text available to subscribers) http://www.newscientist.com/channel/being-human/mg19926694.4...

Book takes look at how yards have evolved

San Francisco ChronicleNow and then we get an unexpected look at the intricacies of our forebears' daily lives. When a friend of Ron's posted bits from "The Household Gem Cyclopaedia: A Reference Library for the Home" (1892, R.S. Peale Co., Chicago), one suggestion made us blink:... http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2008/08/13/...

Differential Selection According To The Degree Of Cheating In A Status Signal

Medical News TodayA badge of status is arbitrary morphological markings of animals, which evolved to avoid unnecessary fights. The maintenance of honesty in a badge-of-status system is not fully understood, despite many studies. Our experiment examined the relationship between badge size and winter survival, and the long-term costs of cheating, by manipulating badge size in male house sparrows.http://www.medicalnewstoday.com/articles/118097.php

Expression of pride is innate, UBC study shows

Regina Leader-PostBlind athletes display nearly identical expressions after victory and defeat as those with sight, suggesting demonstrations of pride and shame are evolved traits rather than learned behaviours, according to a new study from the University of B.C. http://www.canada.com/reginaleaderpost/story.html?id=ea27ee1...

Planet B-boy: Breakdancing has evolved

The Kaleo VoiceFrom August 17th to the 21st, the Honolulu Academy of Arts is bringing back the internationally acclaimed, indie documentary, Planet B-boy.http://www.kaleo.org/news/2008/08/13/MixedPlate/Planet.BBoy....

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Dinosaur's dominance due to chance, study says

Space DailyBecause dinosaurs survived such a long time they have were thought to have evolved faster and adapted better than their competitors. But the new research, published in the journal Science on September 12, suggests it was the crurotarsans who had the ... http://www.spacedaily.com/2006/080911220345.ple1b5y1.html

NT museum to restore Indigenous artworks

Big Pond NewsIt will ... show the genesis of this art movement ... works coming out of Papunya Tula are very sought after and it will [show] us how this art movement started and evolved and where it is at now," she said.http://bigpond.com/news/entertainment/content/20080912/23626...

Developments in online auctions: legal and technical

SCL.orgHe has also focused on and grown Red2’s key business sectors; auction technologies (Business to Consumer, Business to Business and e-Procurement), large-scale social networking systems, travel systems, e-commerce and highly-evolved data warehousinghttp://www.scl.org/event.asp?i=1878

Superstitions evolved to help us survive

New ScientistWe've teamed up with Improbable Research to bring you Improbable TV: videos to make you laugh... and think Darwin never warned against crossing black cats, walking under ladders or stepping on cracks in the pavement, but his theory of natural ... http://www.newscientist.com/channel/being-human/dn14694-supe...

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Evolved Learning Conferences offer teachers and parents a unique and critical approach to learning. Join us for Discover Your Potential, June 3, 4, and 5, 2008.http://www.evolvedlearning.com/
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Answers for Evolved

mariposa

Why do evolutionists get to pick where human evolved from?

mariposaOK - let me get this straight. Evolution is "not cold hard facts written in stone"? Well - you are correct, *nothing* in science is cold hard facts written in stone! However - evolution is the best c...
Taylor

Are there some pokemon that have to be traded in order to be evolved in Diamond and Pearl?

TaylorYes plenty of them: Poliwhirl → Politoed (if King's Rock is attached) Kadabra → Alakazam Machoke → Machamp Graveler → Golem Slowpoke → Slowking (if King's Rock is a...
Sau K

Why is it more parsimonous to assume that photosynthesis evolved very early in prokaryotic life?

Sau Kfirst, how 'bout a definition, from google: Definitions of parsimonious on the Web: * excessively unwilling to spend; "parsimonious thrift relieved by few generous impulses"; "lived in a mos...
yalie_chick

Why is it incorrect to say that modern humans have evolved from Chimpanzees?

yalie_chickHumans and chimpanzees evolved from a common ancestor, not from one another. Let's say there is a population and it splits. Each population (not the individuals) will evolve by means of natural sel...
Mark H

Do you think insects are more evolved than humans?

Mark HIt's considered that half the species and 90% of the lifeforms today are insects, so they are 'more' by any measure of quantity. 400 million years of lifespans as short as a day means a lot of genera...

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