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... Earth teems with a staggering variety of animals, including 9,000 kinds of birds, 28,000 types of fish, and more than 350,000 species of beetles. What explains this explosion of living creatures — 1.4 million different species discovered so far, with perhaps another 50 million to go? The source of lif ...
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Unit 2 Science 7 - Volusia County Schools
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Park, chapter 4 (Processes of Evolution)

... ne of the scientists who “rediscovered” Mendel’s work in 1900 was n tthe Dutch botanist Hugo de Vries (1848–1935). De Vries had been ttrying to explain the variations that sometimes spontaneously appear in plants (and, of course, in animals)—such as a single flower of the wrong color or one that is ...
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dialogues with darwin

... Philadelphia, PA, April 6, 2009… Charles Darwin’s big idea wasn’t simply evolution. Other men, including his own grandfather, had suggested it many years before. His big idea was a full-blown theory of “evolution through natural selection.” Darwin published his theory in 1859 in On the Origin of Spe ...
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... researching for 20 years. Wallace’s short sketch was far from the massive body of evidence Darwin had collected, but its core ideas were similar. Darwin and Wallace agreed that Wallace’s essay should be published along with a summary of Darwin’s theory. A year later, in 1859, Darwin published his bo ...
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Charles Darwin

... researching for 20 years. Wallace’s short sketch was far from the massive body of evidence Darwin had collected, but its core ideas were similar. Darwin and Wallace agreed that Wallace’s essay should be published along with a summary of Darwin’s theory. A year later, in 1859, Darwin published his bo ...
Station #1 – Insect Insanity
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Evolution is the process of cumulative change in the heritable
Evolution is the process of cumulative change in the heritable

... offspring are the fittest. This can be achieved by:  Survival/mortality selection – any trait that promotes survival, at least until the reproductive years are over, increases fitness.  Sexual selection – one gender, usually the females, chooses among available mates. Any inherited trait that impr ...
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The eclipse of Darwinism

Julian Huxley used the phrase ""the eclipse of Darwinism"" to describe the state of affairs prior to the modern evolutionary synthesis when evolution was widely accepted in scientific circles but relatively few biologists believed that natural selection was its primary mechanism. Historians of science such as Peter J. Bowler have used the same phrase as a label for the period within the history of evolutionary thought from the 1880s through the first couple of decades of the 20th century when a number of alternatives to natural selection were developed and explored - as many biologists considered natural selection to have been a wrong guess on Charles Darwin's part, and others regarded natural selection as of relatively minor importance. Recently the term eclipse has been criticized for inaccurately implying that research on Darwinism paused during this period, Paul Farber and Mark Largent have suggested the biological term interphase as an alternative metaphor.There were four major alternatives to natural selection in the late 19th century: Theistic evolution was the belief that God directly guided evolution. (This should not be confused with the more recent use of the term theistic evolution, referring to the theological belief about the compatibility of science and religion.) The idea that evolution was driven by the inheritance of characteristics acquired during the life of the organism was called neo-Lamarckism. Orthogenesis involved the belief that organisms were affected by internal forces or laws of development that drove evolution in particular directions Saltationism propounded the idea that evolution was largely the product of large mutations that created new species in a single step.Theistic evolution largely disappeared from the scientific literature by the end of the 19th century as direct appeals to supernatural causes came to be seen as unscientific. The other alternatives had significant followings well into the 20th century; mainstream biology largely abandoned them only when developments in genetics made them seem increasingly untenable, and when the development of population genetics and the modern evolutionary synthesis demonstrated the explanatory power of natural selection. Ernst Mayr wrote that as late as 1930 most textbooks still emphasized such non-Darwinian mechanisms.
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