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Here, the evolution of female egg receptors is thought to pressure bindin evolution in a selective runaway process. [25] This example of reproductive character displacement is highly suggestive of being the result of—and has been cited as strong evidence for—reinforcement. [25] [3]: 343–344
Their evolution is cited as an example of both natural and sexual selection. [ 40 ] [ 41 ] A 2008 study suggests that sympatric speciation has occurred in Tennessee cave salamanders . [ 42 ] Sympatric speciation driven by ecological factors may also account for the extraordinary diversity of crustaceans living in the depths of Siberia's Lake ...
It is the result of an ancient and widespread practice (spoliation) whereby stone that has been quarried, cut and used in a built structure is carried away to be used elsewhere. The practice is of particular interest to historians, archaeologists and architectural historians since the gravestones, monuments and architectural fragments of ...
The history of the camel provides an example of how fossil evidence can be used to reconstruct migration and subsequent evolution. The fossil record indicates that the evolution of camelids started in North America (see figure 4e), from which, six million years ago, they migrated across the Bering Strait into Asia and then to Africa, and 3.5 ...
Documented examples are found in a wide range of organisms: both vertebrates and invertebrates, fungi, and plants. The secondary contact of originally separated incipient species (the initial stage of speciation) is increasing due to human activities such as the introduction of invasive species or the modification of natural habitats. [6]
Objections to evolution have been raised since evolutionary ideas came to prominence in the 19th century. When Charles Darwin published his 1859 book On the Origin of Species, his theory of evolution (the idea that species arose through descent with modification from a single common ancestor in a process driven by natural selection) initially met opposition from scientists with different ...
Yet the scientific evidence for human evolution keeps piling up with many discoveries of ancient bones, stone tools, cave drawings and other evidence of ancient life. For most people, only modern ...
For some time it was difficult to prove that sympatric speciation was possible, because it was impossible to observe it happening. [3] It was believed by many, and championed by Ernst Mayr, that the theory of evolution by natural selection could not explain how two species could emerge from one if the subspecies were able to interbreed. [29]