Microevolution
With microevolution those evolutionary development of living things is known mainly in creationism and intelligent design, which takes place within a biological species and thus within a short in evolutionary terms, period. It is small changes that result from mutations, recombinations and selection processes to an altered morphology or physiology of organisms. These changes are caused by the change in allele frequencies in the population, " such a change in the genetic structure of a population is called microevolution. "
Accruals
The use of the terms " microevolution " and " macroevolution " is controversial. The majority of evolutionary biologists avoids both terms with the argument that the same facts underlies: In " macroevolutionary " processes, it was merely a temporal summation of " micro-evolutionary " processes, the division was thus artificially blurred. Others, such as Stephen Jay Gould, use the terms because they are of the opinion that in addition also environmental factors play in the dynamics of macro-evolution, in addition to the same processes that are responsible for microevolution, a role. In creationism and intelligent design this subdivision is used to accept a sham indisputable facts of the theory of evolution in the context of microevolution and to give so a semblance of scientific rigor. Especially compared to generally educated people so that will present as part of a creationist tries aspects of the environment of the breeding or development of resistance. In reality, however, concrete and documented evidence of evolution on a small scale are generally rejected in order to reduce formation of species on a system based only on the depletion of the gene pool and selection of basic type concept can. These are eg all forms of mutation, which expand the genetic principle.
Examples
Examples of microevolution
- Which since the 19th century greatly increased occurrence of a dark variant of the peppered moth in English industrial districts, also known as industrial melanism;
- Development of resistance of microorganisms to antibiotics;
- Changes in beak size in Darwin's finches.