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Introgression is an important source of genetic variation in natural populations and may contribute to adaptation and even adaptive radiation. [7] It can occur across hybrid zones due to chance, selection or hybrid zone movement. [8]
In molecular biology and genetics, transformation is the genetic alteration of a cell resulting from the direct uptake and incorporation of exogenous genetic material from its surroundings through the cell membrane(s).
Incorporation of a place, creation of municipal corporation such as a city or county; Incorporation (academic), awarding a degree based on the student having an equivalent degree from another university; Incorporation of the Bill of Rights, extension of parts of the United States Bill of Rights to bind individual American states.
Waddington called the effect he had seen "genetic assimilation". His explanation was that it was caused by a process he called "canalization".He compared embryonic development to a ball rolling down a slope in what he called an epigenetic landscape, where each point on the landscape is a possible state of the organism (involving many variables).
Merton introduced the concept of "obliteration by incorporation" in the 1968 enlarged edition of his landmark work Social Theory and Social Structure (pp. 28, 35). Merton also introduced the less known counterpart to this concept, adumbrationism, meaning the attribution of insights, ideas or analogies absent from original works. [2]
The pygmy mammoth is an example of insular dwarfism, a case of Foster's rule, its unusually small body size an adaptation to the limited resources of its island home.. A biological rule or biological law is a generalized law, principle, or rule of thumb formulated to describe patterns observed in living organisms.
An autogenous model of the origin of eukaryotic cells. Evidence now shows that a mitochondrion-less eukaryote has never existed, i.e. the nucleus was acquired at the same time as the mitochondria.
According to Ford Doolittle, an evolutionary and molecular biologist: “Molecular phylogeneticists will have failed to find the “true tree,” not because their methods are inadequate or because they have chosen the wrong genes, but because the history of life cannot properly be represented as a tree”.