Portal:Evolutionary biology

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Evolutionary biology

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Evolutionary biology is a sub-field of biology concerned with the origin and descent of species, as well as their change, multiplication, and diversity over time. Biologically, evolution is the change in the inherited traits of a population from generation to generation. These traits are the expression of genes that are copied and passed on to offspring during reproduction. Mutations in these genes can produce new or altered traits, resulting in heritable differences (genetic variation) between organisms. New traits can also come from transfer of genes between populations, as in migration, or between species, in horizontal gene transfer. Evolution occurs when these heritable differences become more common or rare in a population, either non-randomly through natural selection or randomly through genetic drift.
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Richard Dawkins
Clinton Richard Dawkins, FRS (born March 26, 1941) is a British ethologist, evolutionary biologist and popular science writer. He holds the Charles Simonyi Chair for the Public Understanding of Science at the University of Oxford. Born in Nairobi, Kenya, Dawkins moved to England with his parents at the age of eight, and completed his education at the University of Oxford. He first came to prominence with his 1976 book The Selfish Gene, which popularised the gene-centered view of evolution and introduced the term meme, playing a significant role in the foundation of memetics as a scientific field of study. In 1982, he made a widely cited contribution to evolutionary biology with the theory, presented in his book The Extended Phenotype, that phenotypic effects are not limited to an organism's body but can stretch far into the environment, which includes the bodies of other organisms. He has since written several best-selling popular books, and made regular appearances on television and radio programmes discussing evolution, creationism, intelligent design, and religion. In addition to his biological work, Dawkins is well-known for his views on religion. He is an outspoken antitheist and atheist; a secular humanist, sceptic, scientific rationalist, and a supporter of the Brights movement.
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The Golden Toad was last seen on May 15, 1989. Decline in amphibian populations is ongoing worldwide.
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The Golden Toad was last seen on May 15, 1989. Decline in amphibian populations is ongoing worldwide.

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  • ...that adaptations enable living organisms to cope with environmental stresses and pressures?
  • ...that maintained gene flow between two populations can also lead to a combination of the two gene pools, reducing the genetic variation between the two groups?
  • ...that all forms of natural speciation have taken place over the course of evolution, though it still remains a subject of debate as to the relative importance of each mechanism in driving biodiversity?
  • ...that despite the relative rarity of suitable conditions for fossilization, approximately 250,000 fossil species are known?
  • ...that genetic sequence evidence thus allows inference and quantification of genetic relatedness between humans and other apes?
  • ...that Charles Darwin's theory of evolution is under attack by respected scientists like evolutionary biologist Stuart Newman.
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Evolutionary biology on Wikinews     Evolutionary biology on Wikiquote     Evolutionary biology on Wikibooks     Evolutionary biology on Wikisource     Evolutionary biology on Wiktionary     Evolutionary biology on Wikimedia Commons
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