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Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, ...
Chalk drawing of Charles (age six) and his sister Catherine late 1830s George Richmond: Water-color portrait from after Darwin's return from the voyage of the Beagle: 1842 Daguerrotype of Darwin (age 33) with his son William, reproduced in The Life, Letters, and Labours of Francis Galton by Karl Pearson: 1849 Thomas Herbert Maguire: 1853 Samuel ...
Because exogenous selection processes posited by the theory of natural selection only have access to correlation, [11] therefore, Fodor and Piattelli-Palmarini argue that the theory of natural selection "cannot predict/explain what traits the creatures in a population are selected-for", [12] and so "the claim that selection is the mechanism of ...
Evolution is the change in the heritable characteristics of biological populations over successive generations. [1] [2] It occurs when evolutionary processes such as natural selection and genetic drift act on genetic variation, resulting in certain characteristics becoming more or less common within a population over successive generations. [3]
The presenter, David Attenborough, outlines the development of the theory by Darwin through his observations of animals and plants in nature and in the domesticated state, visiting sites important in Darwin's own life, including Down House, Cambridge University and the Natural History Museum, and using archive footage from Attenborough's many ...
Disruptive selection is a specific type of natural selection that actively selects against the intermediate in a population, favoring both extremes of the spectrum. Disruptive selection is inferred to oftentimes lead to sympatric speciation through a phyletic gradualism mode of evolution. Disruptive selection can be caused or influenced by ...
The beauty that people perceive in nature has causes at different levels, notably in the mathematics that governs what patterns can physically form, and among living things in the effects of natural selection, that govern how patterns evolve. [22] Mathematics seeks to discover and explain abstract patterns or regularities of all kinds.
Darwin was now working hard on an "abstract" trimmed from his Natural Selection, writing much of it from memory. The chapters were sent to Hooker for correcting as they were completed, which led to a minor disaster when a large bundle was put by accident into the drawer Hooker's wife used to keep paper for the children to draw on.