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By his own account, Herbert Spencer described a concept similar to "survival of the fittest" in his 1852 "A Theory of Population". [9] He first used the phrase – after reading Charles Darwin's On the Origin of Species – in his Principles of Biology of 1864 [10] in which he drew parallels between his economic theories and Darwin's biological, evolutionary ones, writing, "This survival of ...
Natural selection is the differential survival and reproduction of ... in species as proof. [4] [5] ... increase of each species, at some age, season, or year, a ...
Type III or concave curves have the greatest mortality (lowest age-specific survival) early in life, with relatively low rates of death (high probability of survival) for those surviving this bottleneck. This type of curve is characteristic of species that produce a large number of offspring (known as r-selected species).
Science & Tech. Sports. Weather. ... a member of the IUCN Species Survival Commission and a study co-author. ... 5 popular destinations travel planners won't be visiting this year. Sports. Sports.
This week, meet hundreds of species newly discovered in 2023, explore resurrection biology, peer inside an art mystery, and more. Hundreds of unknown species were discovered around the world this year
On the Origin of Species (or, more completely, On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life) [3] is a work of scientific literature by Charles Darwin that is considered to be the foundation of evolutionary biology. It was published on 24 November 1859. [4]
Charles Darwin in 1868. Darwinism is a term used to describe a theory of biological evolution developed by the English naturalist Charles Darwin (1809–1882) and others. The theory states that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce.
The survival potential could in turn be divided into nutritive and protective potentials. [2] Reproductive potential (potential natality) is the upper limit to biotic potential in the absence of mortality. Survival potential is the reciprocal of mortality. Because reproductive potential does not account for the number of gametes surviving ...