Speciation
Speciation is the evolutionary process by which new biological species arise. The biologist Orator F. Cook was the first to coin the term 'speciation' for the splitting of lineages or "cladogenesis," ...
Speciation - Wikipedia
The Origin Of A Species | University Of Oxford
New animal species form when groups of animals become isolated and as a result, begin to separate through evolution (a process known as speciation). When these isolated populations meet later, they mi...
Allopatric speciation
Allopatric speciation (from the ancient Greek allos, "other" + Greek patris, "fatherland") or geographic speciation is speciation that occurs when biological populations of the same species become vi...
Peripatric speciation
Peripatric and peripatry are terms from biogeography, referring to organisms whose ranges are closely adjacent but do not overlap, being separated where these organisms do not occur – for exampl...
Peripatric speciation - Wikipedia
Parapatric speciation
In biogeography, parapatry is the relationship between organisms whose ranges do not significantly overlap but are immediately adjacent to each other; they only occur together in a narrow contact zone...
Sympatric speciation
Sympatric speciation is the process through which new species evolve from a single ancestral species while inhabiting the same geographic region. In evolutionary biology and biogeography, sympatric an...
Sympatric speciation - Wikipedia
Hybrid speciation
Hybrid speciation is a form of speciation wherein hybridization between two different species leads to a new species, reproductively isolated from the parent species. From the 1940s, reproductive isol...
Hybrid speciation - Wikipedia
Interspersed repeat
Interspersed repetitive DNA is found in all eukaryotic genomes. Certain classes of these sequences propagate themselves by RNA mediated transposition, they have been called retrotransposons, and they ...
Interspersed repeat - Wikipedia
Race (biology)
In biological classification, a race is an informal taxonomic rank, below the level of a species. It is used as a higher rank than strain, with several strains making up one race.Races may be distinct...
Salsify
Salsify may refer to:
Sibling species
In biology, a species complex is a group of two or more species very similar in appearance, where exact boundaries between them are often unclear. More narrow terms sometimes used synonymously are cry...
Inparanoid
Inparanoid is an algorithm that finds orthologous genes and paralogous genes that arose—most likely by duplication—after some speciation event. Such protein-coding genes are called in-paralogs, as opp...
Hybrid zone
A hybrid zone exists where the ranges of two interbreeding species or diverged intraspecific lineages meet and cross-fertilize. Hybrid zones can form in situ due to the evolution of a new lineage but ...
Koinophilia
Koinophilia occurs when mate-seeking animals preferentially choose individuals that do not have any unusual, peculiar or deviant features. The term was first used by biologist Johan Koeslag. Natural s...
Koinophilia - Wikipedia
Adaptive radiation
In evolutionary biology, adaptive radiation is a process in which organisms diversify rapidly into a multitude of new forms, particularly when a change in the environment makes new resources available...
List of adaptive radiated marsupials by form
This is a list of adaptive radiated marsupials by form; they are adaptively radiated marsupial species equivalent to the many niche-types of non-marsupial mammals. Many of the surviving species are fr...
List of adaptive radiated marsupials by form - Wikipedia
Saltation (biology)
In biology, saltation (from Latin, saltus, "leap") is a sudden change from one generation to the next, that is large, or very large, in comparison with the usual variation of an organism. The term is ...
Saltation (biology) - Wikipedia
Polyploid
Polyploid cells and organisms are those containing more than two paired (homologous) sets of chromosomes. Most species whose cells have nuclei (Eukaryotes) are diploid, meaning they have two sets of c...
Polyploid - Wikipedia
Heteropatric speciation
Heteropatric and heteropatry are terms from biogeography, referring to organisms whose geographical ranges overlap or are even identical, so that they occur together at least in some places, but which...
Heteropatric speciation - Wikipedia
Averageness
In attractiveness studies, averageness is one of the characteristics of physical beauty in which the average phenotype, i.e. outward appearance, of the individual theoretically characterizes averaged ...
Punctuated equilibrium in social theory
Punctuated equilibrium in social theory is a method of understanding change in complex social systems. The method studies the evolution of policy change, including the evolution of conflicts. The the...
Genetic isolate
A genetic isolate is population of organisms that has little genetic mixing with other organisms within the same species. This may result in speciation, but this is not necessarily the case. Genetic i...
Transmutation of species
Transmutation of species or Transformism are terms often used to describe 19th-century evolutionary ideas for the altering of one species into another that preceded Charles Darwin's theory of natural ...
Transmutation of species - Wikipedia
Species complex
In biology, a species complex is a group of two or more species very similar in appearance, where exact boundaries between them are often unclear. More narrow terms sometimes used synonymously are cry...
Species complex - Wikipedia
Punctuated equilibrium
Punctuated equilibrium (also called punctuated equilibria) is a theory in evolutionary biology which proposes that most species will exhibit little net evolutionary change for most of their geological...
Hutchinson's rule
The observation that the trophic structures (i.e. mouths) of sympatric congeneric species generally vary by a factor of ~1.3. This variation presumably leads to niche differentiation, allowing coexist...
Senecio eboracensis
Senecio eboracensis, the York groundsel or York radiate groundsel, is a self-pollinating hybrid species of ragwortand one of only six new plants to be discovered in either the United Kingdom or North ...
Senecio eboracensis - Wikipedia
Rapid modes of evolution
Rapid modes of evolution have been proposed by several notable biologists ever since Charles Darwin proposed his theory of evolutionary descent by natural selection. In his classic volume On the Origi...
Rapid modes of evolution - Wikipedia
Paleopolyploidy
Paleopolyploidy is the result of genome duplications which occurred at least several million years ago (MYA). Such an event could either double the genome of a single species (autopolyploidy) or comb...
Paleopolyploidy - Wikipedia